ARM: dts: msm: enable vsync-skew for SKU4 panel

Add vsync-skew property to the SKU4 default panel.
This property specifies the primary interface to be
used when vsync-skew is enabled.

Change-Id: Ic374b3aa14ac6b72b3f8f8cd6e51d15c620f2e56

qcom/kona-xrsku4.dtsi

@@ -1292,6 +1292,7 @@
 	qcom,dsi-select-clocks = "mux_byte_clk0", "mux_pixel_clk0";
 	qcom,mdss-dsi-min-refresh-rate = <60>;
 	qcom,mdss-dsi-max-refresh-rate = <90>;
+	qcom,mdss-dsi-skewed-vsync-master = "intf1";
 	qcom,mdss-dsi-display-timings {
 		timing@0 {
 			qcom,mdss-dsi-panel-width = <2160>;