arm64: dts: meson: odroid-c2: Add missing regulator linked to HDMI supply

As per schematics HDMI_P5V0 is supplied by P5V0 so add missing link.

Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts

@@ -66,6 +66,15 @@ p5v0: regulator-p5v0 {
 		regulator-always-on;
 	};
 
+	hdmi_p5v0: regulator-hdmi_p5v0 {
+		compatible = "regulator-fixed";
+		regulator-name = "HDMI_P5V0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		/* AP2331SA-7 */
+		vin-supply = <&p5v0>;
+	};
+
 	tflash_vdd: regulator-tflash_vdd {
 		compatible = "regulator-fixed";
 
@@ -220,6 +229,7 @@ &hdmi_tx {
 	status = "okay";
 	pinctrl-0 = <&hdmi_hpd_pins>, <&hdmi_i2c_pins>;
 	pinctrl-names = "default";
+	hdmi-supply = <&hdmi_p5v0>;
 };
 
 &hdmi_tx_tmds_port {