ARM64: dts: meson-gxl-s905x: Enable internal ethernet PHY

Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: NKevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gxl-s905x.dtsi

@@ -46,3 +46,9 @@
 / {
 	compatible = "amlogic,s905x", "amlogic,meson-gxl";
 };
+
+/* S905X Only has access to its internal PHY */
+&ethmac {
+	phy-mode = "rmii";
+	phy-handle = <&internal_phy>;
+};