bcm963158: add initial support

This add the initial support of the broadcom reference
board bcm963158 with a bcm63158 SoC.

This board has 1 GB of ram, 512 MB of flash (nand),
2 usb port, 1 uart, 4 ethernet ports (LAN), 1 ethernet port (WAN).

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>

configs/bcm963158_ram_defconfig

@@ -0,0 +1,40 @@
+CONFIG_ARM=y
+# CONFIG_ARM64_SUPPORT_AARCH32 is not set
+CONFIG_ARCH_BCM63158=y
+CONFIG_SYS_TEXT_BASE=0x10000000
+CONFIG_SYS_MALLOC_F_LEN=0x8000
+CONFIG_SPL_SYS_MALLOC_F_LEN=0x400
+CONFIG_TARGET_BCM963158=y
+CONFIG_ENV_VARS_UBOOT_CONFIG=y
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_TPL_SYS_MALLOC_F_LEN=0x400
+CONFIG_FIT=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_FIT_ENABLE_RSASSA_PSS_SUPPORT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_IMAGE_FORMAT_LEGACY=y
+CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_BOOTEFI_SELFTEST=y
+# CONFIG_CMD_LZMADEC is not set
+# CONFIG_CMD_UNZIP is not set
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_CACHE=y
+CONFIG_DOS_PARTITION=y
+CONFIG_ISO_PARTITION=y
+CONFIG_EFI_PARTITION=y
+CONFIG_DEFAULT_DEVICE_TREE="bcm963158"
+# CONFIG_NET is not set
+CONFIG_BLK=y
+CONFIG_CLK=y
+# CONFIG_MMC is not set
+CONFIG_SPECIFY_CONSOLE_INDEX=y
+# CONFIG_SPL_SERIAL_PRESENT is not set
+CONFIG_CONS_INDEX=0
+CONFIG_DM_SERIAL=y
+CONFIG_SERIAL_SEARCH_ALL=y
+CONFIG_PL01X_SERIAL=y
+CONFIG_SYSRESET=y
+CONFIG_REGEX=y
+# CONFIG_GENERATE_SMBIOS_TABLE is not set