rockchip: rk3588: Migrate to OF_UPSTREAM

Migrate RK3588 boards that exists in Linux v6.8 to use OF_UPSTREAM.

Following targets is not migrated to use OF_UPSTREAM:
- generic-rk3588: Generic target only meant for U-Boot use
- toybrick-rk3588: 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/rock5b-rk3588_defconfig b/configs/rock5b-rk3588_defconfig
index 9e14b14..fc118ce 100644
--- a/configs/rock5b-rk3588_defconfig
+++ b/configs/rock5b-rk3588_defconfig
@@ -5,7 +5,7 @@
 CONFIG_ARCH_ROCKCHIP=y
 CONFIG_SF_DEFAULT_SPEED=24000000
 CONFIG_SF_DEFAULT_MODE=0x2000
-CONFIG_DEFAULT_DEVICE_TREE="rk3588-rock-5b"
+CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3588-rock-5b"
 CONFIG_ROCKCHIP_RK3588=y
 CONFIG_ROCKCHIP_SPI_IMAGE=y
 CONFIG_SPL_SERIAL=y