arm: dts: am625_sk: Switch to OF_UPSTREAM

Enable OF_UPSTREAM for am625-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: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Tested-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
diff --git a/configs/am62x_evm_a53_defconfig b/configs/am62x_evm_a53_defconfig
index 16294a6..9bfe156 100644
--- a/configs/am62x_evm_a53_defconfig
+++ b/configs/am62x_evm_a53_defconfig
@@ -10,7 +10,7 @@
 CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x80b80000
 CONFIG_SF_DEFAULT_SPEED=25000000
 CONFIG_SPL_DM_SPI=y
-CONFIG_DEFAULT_DEVICE_TREE="k3-am625-sk"
+CONFIG_DEFAULT_DEVICE_TREE="ti/k3-am625-sk"
 CONFIG_SPL_TEXT_BASE=0x80080000
 CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_DM_RESET=y
@@ -56,6 +56,7 @@
 CONFIG_MMC_SPEED_MODE_SET=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