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/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 813426a..5b0bcf3 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1198,8 +1198,7 @@
 			      k3-am642-r5-sk.dtb \
 			      k3-am642-r5-phycore-som-2gb.dtb
 
-dtb-$(CONFIG_SOC_K3_AM625) += k3-am625-sk.dtb \
-			      k3-am625-r5-sk.dtb \
+dtb-$(CONFIG_SOC_K3_AM625) += k3-am625-r5-sk.dtb \
 			      k3-am625-r5-beagleplay.dtb \
 			      k3-am625-verdin-r5.dtb \
 			      k3-am625-r5-phycore-som-2gb.dtb