configs: am65x_hs_evm: Add support for applying overlays

This will allow for downloading and applying overlays from an MMC/SD
boot media based on the overlay_files ENV variable containing a list
of overlay files.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/configs/am65x_hs_evm_a53_defconfig b/configs/am65x_hs_evm_a53_defconfig
index 7d7a673..56052f7 100644
--- a/configs/am65x_hs_evm_a53_defconfig
+++ b/configs/am65x_hs_evm_a53_defconfig
@@ -19,7 +19,7 @@
 CONFIG_SPL_LOAD_FIT=y
 CONFIG_SPL_FIT_IMAGE_POST_PROCESS=y
 CONFIG_OF_BOARD_SETUP=y
-CONFIG_BOOTCOMMAND="run findfdt; run envboot; run init_${boot}; run get_kern_${boot}; run get_fdt_${boot}; run run_kern"
+CONFIG_BOOTCOMMAND="run findfdt; run envboot; run init_${boot}; run get_kern_${boot}; run get_fdt_${boot}; run get_overlay_${boot}; run run_kern"
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_TEXT_BASE=0x80080000
 CONFIG_SPL_SYS_MALLOC_SIMPLE=y
@@ -85,3 +85,4 @@
 CONFIG_SYSRESET=y
 CONFIG_SPL_SYSRESET=y
 CONFIG_SYSRESET_TI_SCI=y
+CONFIG_OF_LIBFDT_OVERLAY=y