arm64: xilinx: Remove address/size-cells from gem nodes

Some boards are using one mdio bus which holds multiple phys and also
boards are using mdio node for bus description. That's why there are cases
where address/size-cells are unnecessary which is also reported by make W=1
dtbs. That's why remove them from zynqmp.dtsi and let board DTSes to handle
it based on used description.

Error log:
/axi/ethernet@ff0e0000: unnecessary #address-cells/#size-cells without
"ranges" or child "reg" property
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/7252203d52af3ca8867764c8514affc4828e530d.1695040866.git.michal.simek@amd.com

arch/arm64/boot/dts/xilinx/zynqmp.dtsi

@@ -584,8 +584,6 @@ gem0: ethernet@ff0b0000 {
 				     <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0x0 0xff0b0000 0x0 0x1000>;
 			clock-names = "pclk", "hclk", "tx_clk", "rx_clk", "tsu_clk";
-			#address-cells = <1>;
-			#size-cells = <0>;
 			iommus = <&smmu 0x874>;
 			power-domains = <&zynqmp_firmware PD_ETH_0>;
 			resets = <&zynqmp_reset ZYNQMP_RESET_GEM0>;
@@ -600,8 +598,6 @@ gem1: ethernet@ff0c0000 {
 				     <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0x0 0xff0c0000 0x0 0x1000>;
 			clock-names = "pclk", "hclk", "tx_clk", "rx_clk", "tsu_clk";
-			#address-cells = <1>;
-			#size-cells = <0>;
 			iommus = <&smmu 0x875>;
 			power-domains = <&zynqmp_firmware PD_ETH_1>;
 			resets = <&zynqmp_reset ZYNQMP_RESET_GEM1>;
@@ -616,8 +612,6 @@ gem2: ethernet@ff0d0000 {
 				     <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0x0 0xff0d0000 0x0 0x1000>;
 			clock-names = "pclk", "hclk", "tx_clk", "rx_clk", "tsu_clk";
-			#address-cells = <1>;
-			#size-cells = <0>;
 			iommus = <&smmu 0x876>;
 			power-domains = <&zynqmp_firmware PD_ETH_2>;
 			resets = <&zynqmp_reset ZYNQMP_RESET_GEM2>;
@@ -632,8 +626,6 @@ gem3: ethernet@ff0e0000 {
 				     <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0x0 0xff0e0000 0x0 0x1000>;
 			clock-names = "pclk", "hclk", "tx_clk", "rx_clk", "tsu_clk";
-			#address-cells = <1>;
-			#size-cells = <0>;
 			iommus = <&smmu 0x877>;
 			power-domains = <&zynqmp_firmware PD_ETH_3>;
 			resets = <&zynqmp_reset ZYNQMP_RESET_GEM3>;