configs: j721s2_evm_r5: Enable support for building multiple dtbs into FIT

Enable configs for building multiple dtbs into a single fit image
and load the right dtb for next stage. This will help to use same
defconfig for both EVM and SK.

Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
diff --git a/configs/j721s2_evm_r5_defconfig b/configs/j721s2_evm_r5_defconfig
index cd25016..7cdded6 100644
--- a/configs/j721s2_evm_r5_defconfig
+++ b/configs/j721s2_evm_r5_defconfig
@@ -84,6 +84,9 @@
 CONFIG_CMD_FAT=y
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
+CONFIG_SPL_MULTI_DTB_FIT=y
+CONFIG_SPL_OF_LIST="k3-j721s2-r5-common-proc-board k3-am68-sk-r5-base-board"
+CONFIG_SPL_MULTI_DTB_FIT_NO_COMPRESSION=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_SPL_DM=y
 CONFIG_SPL_DM_SEQ_ALIAS=y