ARM: dts: owl-s500: Add ethernet support

Add Ethernet MAC device tree node for Actions Semi S500 SoC.

Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Cristian Ciocaltea <[e-mail]>
Signed-off-by: Manivannan Sadhasivam <[e-mail]>
Reviewed-by: Manivannan Sadhasivam <[e-mail]>
Link: https://lore.kernel.org/r/222ee0c2cb[e-mail]
Link: https://lore.kernel.org/r/[e-mail]'
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/arm/boot/dts/owl-s500.dtsi

···
 			dma-names = "mmc";
 			status = "disabled";
 		};
+
+		ethernet: ethernet@b0310000 {
+			compatible = "actions,s500-emac", "actions,owl-emac";
+			reg = <0xb0310000 0x10000>;
+			interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cmu CLK_ETHERNET>, <&cmu CLK_RMII_REF>;
+			clock-names = "eth", "rmii";
+			resets = <&cmu RESET_ETHERNET>;
+			status = "disabled";
+		};
 	};
 };