ARM: config: Refresh IXP4xx config after multiplatform

After converting to multiplatform the old IXP4xx defconfig
doesn't even activate the ethernet driver anymore, we need
to refresh this thoroughly.

- Drop options that ARCH_MULTI_V5 selects for us.
- Some options moved around because of multiplatform and
  because generic Kconfig movements.
- Drop all MACH_* that do not exist anymore.
- Compress the kernel and initramfs with XZ as the memory
  is often limited for these machines.
- Make sure IXP4XX_QMGR and IXP4XX_NPE is selected.
- Make sure the MTD_PHYSMAP_IXP4XX is selected and not
  the old MTD_IXP4XX (will be deleted).
- Activate CRYPTO_DEV_IXP4XX
- Add some very basic default drivers such as AT24 EEPROMs
  used in many routers.
- Add some kernel configs needed to bring up OpenWrt
  which is the only userspace for these devices:
  CGROUPS, DEVTMPFS, INOTIFY_USER, SIGNALFD, TIMERFD,
  EPOLL, OVERLAY_FS and SQUASHFS.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Arnd Bergmann <arnd@kernel.org>
Cc: Krzysztof Halasa <khalasa@piap.pl>
Cc: Imre Kaloz <kaloz@openwrt.org>
Link: https://lore.kernel.org/r/20220407204502.2470560-1-linus.walleij@linaro.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/ixp4xx_defconfig

@@ -1,37 +1,22 @@
+CONFIG_KERNEL_XZ=y
 CONFIG_SYSVIPC=y
 CONFIG_BSD_PROCESS_ACCT=y
 CONFIG_LOG_BUF_SHIFT=14
+CONFIG_CGROUPS=y
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_COMPRESSION_XZ=y
 CONFIG_EXPERT=y
-CONFIG_MODULES=y
-CONFIG_MODVERSIONS=y
-# CONFIG_BLK_DEV_BSG is not set
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_IXP4XX=y
-CONFIG_MACH_NSLU2=y
-CONFIG_MACH_AVILA=y
-CONFIG_MACH_LOFT=y
-CONFIG_ARCH_ADI_COYOTE=y
-CONFIG_MACH_GATEWAY7001=y
-CONFIG_MACH_WG302V2=y
-CONFIG_ARCH_IXDP425=y
-CONFIG_MACH_IXDPG425=y
-CONFIG_MACH_IXDP465=y
-CONFIG_MACH_KIXRP435=y
-CONFIG_ARCH_PRPMC1100=y
-CONFIG_MACH_NAS100D=y
-CONFIG_MACH_DSMG600=y
-CONFIG_MACH_FSG=y
-CONFIG_MACH_GTWX5715=y
-CONFIG_IXP4XX_QMGR=y
-CONFIG_IXP4XX_NPE=y
 # CONFIG_ARM_THUMB is not set
 CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_AEABI=y
-CONFIG_ZBOOT_ROM_TEXT=0x0
-CONFIG_ZBOOT_ROM_BSS=0x0
-CONFIG_CMDLINE="console=ttyS0,115200 ip=bootp root=/dev/nfs"
-CONFIG_FPE_NWFPE=y
+CONFIG_CMDLINE="console=ttyS0,115200"
+CONFIG_STRICT_KERNEL_RWX=y
+CONFIG_STRICT_MODULE_RWX=y
+CONFIG_MODULES=y
+CONFIG_MODVERSIONS=y
+CONFIG_PARTITION_ADVANCED=y
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y
@@ -44,8 +29,6 @@ CONFIG_IP_ROUTE_VERBOSE=y
 CONFIG_IP_PNP=y
 CONFIG_IP_PNP_DHCP=y
 CONFIG_IP_PNP_BOOTP=y
-CONFIG_NET_IPGRE=m
-CONFIG_NET_IPGRE_BROADCAST=y
 CONFIG_IP_MROUTE=y
 CONFIG_IP_PIMSM_V1=y
 CONFIG_IP_PIMSM_V2=y
@@ -66,7 +49,6 @@ CONFIG_IP_NF_IPTABLES=m
 CONFIG_IP_NF_MATCH_TTL=m
 CONFIG_IP_NF_FILTER=m
 CONFIG_IP_NF_TARGET_REJECT=m
-CONFIG_IP_NF_TARGET_LOG=m
 CONFIG_IP_NF_MANGLE=m
 CONFIG_IP_NF_ARPTABLES=m
 CONFIG_IP_NF_ARPFILTER=m
@@ -77,14 +59,12 @@ CONFIG_ATM_MPOA=m
 CONFIG_ATM_BR2684=m
 CONFIG_BRIDGE=m
 CONFIG_VLAN_8021Q=m
-CONFIG_IPX=m
 CONFIG_ATALK=m
 CONFIG_DEV_APPLETALK=m
 CONFIG_IPDDP=m
 CONFIG_IPDDP_ENCAP=y
 CONFIG_X25=m
 CONFIG_LAPB=m
-CONFIG_WAN_ROUTER=m
 CONFIG_NET_SCHED=y
 CONFIG_NET_SCH_CBQ=m
 CONFIG_NET_SCH_HTB=m
@@ -105,91 +85,92 @@ CONFIG_NET_CLS_RSVP6=m
 CONFIG_NET_CLS_ACT=y
 CONFIG_NET_ACT_POLICE=y
 CONFIG_NET_PKTGEN=m
+CONFIG_DEVTMPFS=y
 CONFIG_MTD=y
 CONFIG_MTD_REDBOOT_PARTS=y
 CONFIG_MTD_BLOCK=y
 CONFIG_MTD_CFI=y
 CONFIG_MTD_CFI_INTELEXT=y
+CONFIG_MTD_COMPLEX_MAPPINGS=y
 CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_PHYSMAP_OF=y
-CONFIG_MTD_COMPLEX_MAPPINGS=y
-CONFIG_MTD_IXP4XX=y
+CONFIG_MTD_PHYSMAP_IXP4XX=y
 CONFIG_MTD_RAW_NAND=m
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=8192
+CONFIG_EEPROM_AT24=y
 CONFIG_EEPROM_LEGACY=y
 # CONFIG_SCSI_PROC_FS is not set
 CONFIG_BLK_DEV_SD=y
+# CONFIG_BLK_DEV_BSG is not set
 # CONFIG_SCSI_LOWLEVEL is not set
 CONFIG_ATA=y
-CONFIG_SATA_VIA=y
-CONFIG_PATA_ARTOP=y
-CONFIG_PATA_CMD64X=y
-CONFIG_PATA_HPT366=y
-CONFIG_PATA_HPT37X=y
-CONFIG_PATA_HPT3X2N=y
-CONFIG_PATA_PDC2027X=y
 CONFIG_PATA_IXP4XX_CF=y
 CONFIG_NETDEVICES=y
 CONFIG_DUMMY=y
-CONFIG_NET_ETHERNET=y
-CONFIG_MII=y
+CONFIG_ATM_TCP=m
 CONFIG_IXP4XX_ETH=y
-CONFIG_NET_PCI=y
 CONFIG_WAN=y
-CONFIG_HDLC=m
+CONFIG_HDLC=y
 CONFIG_HDLC_RAW=m
 CONFIG_HDLC_CISCO=m
 CONFIG_HDLC_FR=m
 CONFIG_HDLC_PPP=m
-CONFIG_HDLC_X25=m
-CONFIG_WAN_ROUTER_DRIVERS=m
-CONFIG_ATM_TCP=m
-# CONFIG_INPUT_KEYBOARD is not set
+CONFIG_IXP4XX_HSS=m
+# CONFIG_KEYBOARD_ATKBD is not set
+CONFIG_KEYBOARD_GPIO=y
 # CONFIG_INPUT_MOUSE is not set
 CONFIG_INPUT_MISC=y
-CONFIG_INPUT_IXP4XX_BEEPER=y
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=2
+CONFIG_SERIAL_8250_RUNTIME_UARTS=2
 CONFIG_SERIAL_OF_PLATFORM=y
-CONFIG_I2C=y
+CONFIG_HW_RANDOM=y
 CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_GPIO=y
+CONFIG_GPIO_GW_PLD=y
+CONFIG_GPIO_PCA953X=y
+CONFIG_SENSORS_AD7418=y
 CONFIG_SENSORS_W83781D=y
 CONFIG_WATCHDOG=y
 CONFIG_IXP4XX_WATCHDOG=y
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_OHCI_HCD=y
-CONFIG_USB_UHCI_HCD=y
 CONFIG_USB_STORAGE=y
 CONFIG_NEW_LEDS=y
 CONFIG_LEDS_CLASS=y
-CONFIG_LEDS_FSG=y
 CONFIG_LEDS_GPIO=y
 CONFIG_LEDS_TRIGGERS=y
 CONFIG_LEDS_TRIGGER_TIMER=y
 CONFIG_LEDS_TRIGGER_DISK=y
 CONFIG_LEDS_TRIGGER_HEARTBEAT=y
 CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_DS1672=y
 CONFIG_RTC_DRV_ISL1208=y
 CONFIG_RTC_DRV_X1205=y
 CONFIG_RTC_DRV_PCF8563=y
+CONFIG_IXP4XX_QMGR=y
+CONFIG_IXP4XX_NPE=y
 CONFIG_EXT2_FS=y
 CONFIG_EXT2_FS_XATTR=y
 CONFIG_EXT2_FS_POSIX_ACL=y
 CONFIG_EXT3_FS=y
 CONFIG_EXT3_FS_POSIX_ACL=y
+CONFIG_OVERLAY_FS=y
 CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
 CONFIG_JFFS2_FS=y
+CONFIG_SQUASHFS=y
+CONFIG_SQUASHFS_XZ=y
 CONFIG_NFS_FS=y
-CONFIG_NFS_V3=y
 CONFIG_ROOT_NFS=y
-CONFIG_PARTITION_ADVANCED=y
+CONFIG_CRYPTO_DEV_IXP4XX=y
 CONFIG_MAGIC_SYSRQ=y
-CONFIG_DEBUG_KERNEL=y
+CONFIG_DEBUG_FS=y
 CONFIG_DEBUG_LL=y
 CONFIG_DEBUG_LL_UART_8250=y