rockchip: rk3328: Migrate to OF_UPSTREAM

All RK3328 boards has now been synced to Linux kernel v6.8 DTs and can
migrate to use OF_UPSTREAM.

Migrate all RK3328 boards to use OF_UPSTREAM.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/nanopi-r2c-rk3328_defconfig b/configs/nanopi-r2c-rk3328_defconfig
index 8960c1a..533dc10 100644
--- a/configs/nanopi-r2c-rk3328_defconfig
+++ b/configs/nanopi-r2c-rk3328_defconfig
@@ -6,7 +6,7 @@
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_SF_DEFAULT_SPEED=20000000
 CONFIG_ENV_OFFSET=0x3F8000
-CONFIG_DEFAULT_DEVICE_TREE="rk3328-nanopi-r2c"
+CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3328-nanopi-r2c"
 CONFIG_DM_RESET=y
 CONFIG_ROCKCHIP_RK3328=y
 CONFIG_DEBUG_UART_BASE=0xFF130000