arm64: dts: ls1028a: Add optional property node for Mali DP500

This patch use the optional property node "arm,malidp-arqos-value" to
can be dynamic configure QoS signaling.
Signed-off-by: Wen He <wen.he_1@nxp.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi

@@ -554,6 +554,7 @@ malidp0: display@f080000 {
 		clocks = <&dpclk>, <&aclk>, <&aclk>, <&pclk>;
 		clock-names = "pxlclk", "mclk", "aclk", "pclk";
 		arm,malidp-output-port-lines = /bits/ 8 <8 8 8>;
+		arm,malidp-arqos-value = <0xd000d000>;
 
 		port {
 			dp0_out: endpoint {