ARM: AM43xx: Enable post-processing of FIT artifacts loaded by U-Boot

Enable the platform-specific post-processing of FIT-extracted blobs such
as Kernel, DTB, and initramfs on TI AM43xx high-security (HS) devices
which will ultimately invoke a ROM-based API call that performs secure
processing such as blob authentication.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/am43xx_hs_evm_defconfig b/configs/am43xx_hs_evm_defconfig
index 1553196..55ae2fd 100644
--- a/configs/am43xx_hs_evm_defconfig
+++ b/configs/am43xx_hs_evm_defconfig
@@ -14,6 +14,7 @@
 CONFIG_SYS_EXTRA_OPTIONS="CONS_INDEX=1, NAND"
 CONFIG_SPL_LOAD_FIT=y
 CONFIG_SPL_FIT_IMAGE_POST_PROCESS=y
+CONFIG_FIT_IMAGE_POST_PROCESS=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMLS is not set