rockchip: rk356x: Migrate to OF_UPSTREAM

Migrate RK356x boards that exists in Linux v6.8 to use OF_UPSTREAM.

Following targets is not migrated to use OF_UPSTREAM:
- anbernic-rgxx3-rk3566: Multi device target
- generic-rk3568: Generic target only meant for U-Boot use
- pinetab2-rk3566: Merged in v6.9-rc1

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/anbernic-rgxx3-rk3566_defconfig b/configs/anbernic-rgxx3-rk3566_defconfig
index fcade91..a03509b 100644
--- a/configs/anbernic-rgxx3-rk3566_defconfig
+++ b/configs/anbernic-rgxx3-rk3566_defconfig
@@ -38,6 +38,7 @@
 # CONFIG_SPL_DOS_PARTITION is not set
 CONFIG_SPL_OF_CONTROL=y
 CONFIG_OF_LIVE=y
+# CONFIG_OF_UPSTREAM is not set
 CONFIG_OF_SPL_REMOVE_PROPS="clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 # CONFIG_NET is not set