Adapt device tree to use new ethernet driver

The old ethernet driver called xemacps is deprecated in favor
of macb, however macb requires a slightly different device tree node

boot/devicetree.dts

@@ -282,34 +282,16 @@
 		};
 
 		ethernet@e000b000 {
-			compatible = "xlnx,ps7-ethernet-1.00.a";
+			compatible = "cdns,zynq-gem", "cdns,gem";
 			reg = <0xe000b000 0x1000>;
 			status = "okay";
-			interrupts = <0x0 0x16 0x4>;
-			clocks = <0x1 0xd 0x1 0x1e>;
-			clock-names = "ref_clk", "aper_clk";
-			local-mac-address = [00 0a 35 00 22 5c];
-			xlnx,has-mdio = <0x1>;
-			#address-cells = <0x1>;
-			#size-cells = <0x0>;
-			enet-reset = <0x4 0x2f 0x0>;
+			interrupts = <0x00 0x16 0x04>;
+			clocks = <0x01 0x1e 0x01 0x1e 0x01 0x0d>;
+			clock-names = "pclk", "hclk", "tx_clk";
+			#address-cells = <0x01>;
+			#size-cells = <0x00>;
 			phy-mode = "rgmii-id";
 			xlnx,ptp-enet-clock = <0x69f6bcb>;
-			phy-handle = <0x5>;
-
-			mdio {
-				#address-cells = <0x1>;
-				#size-cells = <0x0>;
-
-				phy@0 {
-					compatible = "marvell,88e1512";
-					device_type = "ethernet-phy";
-					reg = <0x0>;
-					marvell,reg-init = <0x3 0x10 0xff00 0x1e 0x3 0x11 0xfff0 0x0>;
-					linux,phandle = <0x5>;
-					phandle = <0x5>;
-				};
-			};
 		};
 
 		ethernet@e000c000 {