ARM: dts: stm32: add supplies to usbphyc ports on stm32mp157c-ed1

USBPHYC ports require 3 supplies: 3v3, 1v1 and 1v8.
This patch adds the corresponding properties to usbphyc ports on
stm32mp157c-ed1 board.
Signed-off-by: NAmelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: NAlexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157c-ed1.dts

@@ -23,6 +23,30 @@
 	aliases {
 		serial0 = &uart4;
 	};
+
+	reg11: reg11 {
+		compatible = "regulator-fixed";
+		regulator-name = "reg11";
+		regulator-min-microvolt = <1100000>;
+		regulator-max-microvolt = <1100000>;
+		regulator-always-on;
+	};
+
+	reg18: reg18 {
+		compatible = "regulator-fixed";
+		regulator-name = "reg18";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+	};
+
+	vdd_usb: vdd-usb {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_usb";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
 };
 
 &rng1 {
@@ -49,3 +73,15 @@
 	pinctrl-0 = <&uart4_pins_a>;
 	status = "okay";
 };
+
+&usbphyc_port0 {
+	phy-supply = <&vdd_usb>;
+	vdda1v1-supply = <&reg11>;
+	vdda1v8-supply = <&reg18>;
+};
+
+&usbphyc_port1 {
+	phy-supply = <&vdd_usb>;
+	vdda1v1-supply = <&reg11>;
+	vdda1v8-supply = <&reg18>;
+};