imx-drm: update and fix imx6 DT descriptions for v3 HDMI driver

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/boot/dts/imx6dl.dtsi

@@ -90,5 +90,6 @@ lvds-channel@1 {
 };
 
 &hdmi {
+	compatible = "fsl,imx6dl-hdmi";
 	crtcs = <&ipu1 0>, <&ipu1 1>;
-}
+};

arch/arm/boot/dts/imx6q.dtsi

@@ -161,5 +161,6 @@ lvds-channel@1 {
 };
 
 &hdmi {
+	compatible = "fsl,imx6q-hdmi";
 	crtcs = <&ipu1 0>, <&ipu1 1>, <&ipu2 0>, <&ipu2 1>;
 };

arch/arm/boot/dts/imx6qdl.dtsi

@@ -1369,7 +1369,6 @@ lvds-channel@1 {
 			};
 
 			hdmi: hdmi@0120000 {
-				compatible = "fsl,imx6q-hdmi";
 				reg = <0x00120000 0x9000>;
 				interrupts = <0 115 0x04>;
 				gpr = <&gpr>;