arm64: dts: meson-sm1: add video decoder compatible

Add the video decoder specific compatible for Amlogic SM1 SoC.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-sm1.dtsi

@@ -482,6 +482,10 @@ &simplefb_hdmi {
 	power-domains = <&pwrc PWRC_SM1_VPU_ID>;
 };
 
+&vdec {
+	compatible = "amlogic,sm1-vdec";
+};
+
 &vpu {
 	power-domains = <&pwrc PWRC_SM1_VPU_ID>;
 };