arm64: dts: rockchip: rv1126bp: Make rgb output compatible with RV1126

Change-Id: I9ff1031939ad7e53b5e583c5febb6a8ab551d20e
Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>

arch/arm64/boot/dts/rockchip/rv1126bp.dtsi

@@ -8,6 +8,17 @@
 / {
 };
 
+&rgb {
+	/*
+	 * RV1126 compatible pin output mode 0.
+	 *
+	 * MCU: ROCKCHIP_MCU_DATA_MAP_DATA_1x24
+	 * BT1120: ROCKCHIP_BT1120_DATA_MAP_DATA_PADLO
+	 * BT656: ROCKCHIP_BT656_DATA_MAP_PADLO
+	 */
+	rockchip,data-map-mode = <0>;
+};
+
 &usb_drd_dwc3 {
 	phys = <&usb2phy_otg>;
 	phy-names = "usb2-phy";