arm64: zynqmp: Add psgtr description to zc1751 dc1 board

Wire psgtr for zc1751 dc1 board.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/zynqmp-zc1751-xm015-dc1.dts

@@ -441,4 +441,7 @@
 
 &zynqmp_dpsub {
 	status = "okay";
+	phy-names = "dp-phy0", "dp-phy1";
+	phys = <&psgtr 1 PHY_TYPE_DP 0 0>,
+	       <&psgtr 0 PHY_TYPE_DP 1 1>;
 };