ARM: zynq: DT: Fix GEM register area size

The size of the GEM's register area is only 0x1000 bytes.
Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

arch/arm/boot/dts/zynq-7000.dtsi

@@ -195,7 +195,7 @@
 
 		gem0: ethernet@e000b000 {
 			compatible = "cdns,gem";
-			reg = <0xe000b000 0x4000>;
+			reg = <0xe000b000 0x1000>;
 			status = "disabled";
 			interrupts = <0 22 4>;
 			clocks = <&clkc 30>, <&clkc 30>, <&clkc 13>;
@@ -206,7 +206,7 @@
 
 		gem1: ethernet@e000c000 {
 			compatible = "cdns,gem";
-			reg = <0xe000c000 0x4000>;
+			reg = <0xe000c000 0x1000>;
 			status = "disabled";
 			interrupts = <0 45 4>;
 			clocks = <&clkc 31>, <&clkc 31>, <&clkc 14>;