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/bpi-r2-pro-rk3568_defconfig b/configs/bpi-r2-pro-rk3568_defconfig
index a0caa36..eccc15a 100644
--- a/configs/bpi-r2-pro-rk3568_defconfig
+++ b/configs/bpi-r2-pro-rk3568_defconfig
@@ -2,7 +2,7 @@
 CONFIG_SKIP_LOWLEVEL_INIT=y
 CONFIG_COUNTER_FREQUENCY=24000000
 CONFIG_ARCH_ROCKCHIP=y
-CONFIG_DEFAULT_DEVICE_TREE="rk3568-bpi-r2-pro"
+CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3568-bpi-r2-pro"
 CONFIG_ROCKCHIP_RK3568=y
 CONFIG_SPL_SERIAL=y
 CONFIG_DEBUG_UART_BASE=0xFE660000