configs: j721s2_evm_a72: 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. Add k3-am68-sk-base-board
dtb along with evm dtb inside DTB FIT image. This helps to use same
defconfig for both EVM and SK

Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
1 file changed