ARM: dts: meson-sm1-odroid-c4: add ethernet PHY reset

The PHY needs a reset in order to be functionnal for U-Boot, add the old
PHY reset bindings for dwmac until we support the new bindings in the PHY node.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Tested-by: NAnand Moon <linux.amoon@gmail.com>

arch/arm/dts/meson-sm1-odroid-c4-u-boot.dtsi

@@ -5,3 +5,9 @@
  */
 
 #include "meson-g12-common-u-boot.dtsi"
+
+&ethmac {
+	snps,reset-gpio = <&gpio GPIOZ_15 (GPIO_ACTIVE_LOW | GPIO_OPEN_DRAIN)>;
+	snps,reset-delays-us = <0 10000 1000000>;
+	snps,reset-active-low;
+};