arm: dts: Add xlnx prefix to GEM compatible string

cdns,zynq/zynqmp were recentle deprecated in Linux in favour of xlnx
prefix. Add this new compatible string and retain the existing string for
compatibility with uboot drivers.

Signed-off-by: Harini Katakam <harini.katakam@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/a38b1b55132fc026cc09224dba61e42fd03b1a36.1661259558.git.michal.simek@amd.com
diff --git a/arch/arm/dts/zynqmp.dtsi b/arch/arm/dts/zynqmp.dtsi
index fbc6e75..2aaec6c 100644
--- a/arch/arm/dts/zynqmp.dtsi
+++ b/arch/arm/dts/zynqmp.dtsi
@@ -529,7 +529,7 @@
 		};
 
 		gem0: ethernet@ff0b0000 {
-			compatible = "cdns,zynqmp-gem", "cdns,gem";
+			compatible = "xlnx,zynqmp-gem", "cdns,zynqmp-gem", "cdns,gem";
 			status = "disabled";
 			interrupt-parent = <&gic>;
 			interrupts = <0 57 4>, <0 57 4>;
@@ -543,7 +543,7 @@
 		};
 
 		gem1: ethernet@ff0c0000 {
-			compatible = "cdns,zynqmp-gem", "cdns,gem";
+			compatible = "xlnx,zynqmp-gem", "cdns,zynqmp-gem", "cdns,gem";
 			status = "disabled";
 			interrupt-parent = <&gic>;
 			interrupts = <0 59 4>, <0 59 4>;
@@ -557,7 +557,7 @@
 		};
 
 		gem2: ethernet@ff0d0000 {
-			compatible = "cdns,zynqmp-gem", "cdns,gem";
+			compatible = "xlnx,zynqmp-gem", "cdns,zynqmp-gem", "cdns,gem";
 			status = "disabled";
 			interrupt-parent = <&gic>;
 			interrupts = <0 61 4>, <0 61 4>;
@@ -571,7 +571,7 @@
 		};
 
 		gem3: ethernet@ff0e0000 {
-			compatible = "cdns,zynqmp-gem", "cdns,gem";
+			compatible = "xlnx,zynqmp-gem", "cdns,zynqmp-gem", "cdns,gem";
 			status = "disabled";
 			interrupt-parent = <&gic>;
 			interrupts = <0 63 4>, <0 63 4>;