board: rockchip: Add support for FriendlyARM NanoPi R2C Plus

The NanoPi R2C Plus is a small variant of NanoPi R2C with a on-board
eMMC flash (8G) included.

The device tree is taken from the kernel v6.5.

Signed-off-by: Tianling Shen <cnsztl@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 89c2986..bc0dbaa 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -126,6 +126,7 @@
 dtb-$(CONFIG_ROCKCHIP_RK3328) += \
 	rk3328-evb.dtb \
 	rk3328-nanopi-r2c.dtb \
+	rk3328-nanopi-r2c-plus.dtb \
 	rk3328-nanopi-r2s.dtb \
 	rk3328-orangepi-r1-plus.dtb \
 	rk3328-orangepi-r1-plus-lts.dtb \