ARM: AM437x: Enable FIT for hs platforms

Adds FIT support to the SPL and u-boot for AM437x HS devices.

Signed-off-by: Madan Srinivas <madans@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>

configs/am437x_hs_evm_defconfig

@@ -10,7 +10,9 @@ CONFIG_DEFAULT_DEVICE_TREE="am437x-gp-evm"
 CONFIG_SPL=y
 CONFIG_ISW_ENTRY_ADDR=0x40302ae0
 CONFIG_SPL_STACK_R=y
+CONFIG_FIT=y
 CONFIG_SYS_EXTRA_OPTIONS="CONS_INDEX=1, NAND"
+CONFIG_SPL_LOAD_FIT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMLS is not set
@@ -33,6 +35,7 @@ CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
+CONFIG_OF_LIST="am437x-gp-evm"
 CONFIG_DM=y
 CONFIG_DM_MMC=y
 CONFIG_SPI_FLASH=y
@@ -53,3 +56,4 @@ CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_G_DNL_MANUFACTURER="Texas Instruments"
 CONFIG_G_DNL_VENDOR_NUM=0x0403
 CONFIG_G_DNL_PRODUCT_NUM=0xbd00
+CONFIG_SPL_OF_LIBFDT=y