arm: dts: am62a7_sk: Switch to OF_UPSTREAM

Enable OF_UPSTREAM for am62a7-sk board. Remove DT files that
are now available in dts/upstream. Update the appended files based on
version of latest OF_UPSTREAM sync point (v6.10-rc1).

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
diff --git a/configs/am62ax_evm_a53_defconfig b/configs/am62ax_evm_a53_defconfig
index 6b29a4b..2a71b06 100644
--- a/configs/am62ax_evm_a53_defconfig
+++ b/configs/am62ax_evm_a53_defconfig
@@ -8,7 +8,7 @@
 CONFIG_TARGET_AM62A7_A53_EVM=y
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
 CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x80480000
-CONFIG_DEFAULT_DEVICE_TREE="k3-am62a7-sk"
+CONFIG_DEFAULT_DEVICE_TREE="ti/k3-am62a7-sk"
 CONFIG_SPL_TEXT_BASE=0x80080000
 CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_DM_RESET=y
@@ -39,6 +39,7 @@
 CONFIG_CMD_MMC=y
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_UPSTREAM=y
 CONFIG_MULTI_DTB_FIT=y
 CONFIG_SPL_MULTI_DTB_FIT=y
 CONFIG_SPL_MULTI_DTB_FIT_NO_COMPRESSION=y