armv8: ls1012ardb: Add distro secure boot support

Enable validation of boot.scr script prior to its execution dependent
on "secureboot" flag in environment. Enable fall back option to
qspi boot in case of secure boot.

Signed-off-by: Sumit Garg <sumit.garg@nxp.com>
Signed-off-by: Vinitha Pillai <vinitha.pillai@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

configs/ls1012ardb_qspi_SECURE_BOOT_defconfig

@@ -2,7 +2,9 @@ CONFIG_ARM=y
 CONFIG_TARGET_LS1012ARDB=y
 CONFIG_SECURE_BOOT=y
 CONFIG_FSL_LS_PPA=y
+CONFIG_QSPI_AHB_INIT=y
 CONFIG_DEFAULT_DEVICE_TREE="fsl-ls1012a-rdb"
+CONFIG_DISTRO_DEFAULTS=y
 # CONFIG_SYS_MALLOC_F is not set
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y
@@ -12,7 +14,7 @@ CONFIG_QSPI_BOOT=y
 CONFIG_BOOTDELAY=10
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyS0,115200 root=/dev/ram0 earlycon=uart8250,mmio,0x21c0500 quiet lpj=250000"
-CONFIG_HUSH_PARSER=y
+# CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_GPT=y
 CONFIG_CMD_I2C=y
@@ -20,16 +22,12 @@ CONFIG_CMD_MMC=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_USB=y
-# CONFIG_CMD_SETEXPR is not set
-CONFIG_CMD_DHCP=y
-CONFIG_CMD_MII=y
-CONFIG_CMD_PING=y
 CONFIG_CMD_CACHE=y
-CONFIG_CMD_EXT2=y
-CONFIG_CMD_FAT=y
 CONFIG_OF_CONTROL=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y
+# CONFIG_BLK is not set
+CONFIG_DM_MMC=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_NETDEVICES=y
@@ -42,6 +40,7 @@ CONFIG_SYS_NS16550=y
 CONFIG_DM_SPI=y
 CONFIG_FSL_DSPI=y
 CONFIG_USB=y
+CONFIG_DM_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_DWC3=y
 CONFIG_USB_STORAGE=y