ARM: dts: msm: Add dummy VBUS regulator for hsic hub for apq8074

Dragonboard APQ8074 has an always-on VBUS supply for HSIC hub,
providing a dummy regulator to make smsc driver happy.

Change-Id: I89137a076db13f4beb0795f33b13d8959b0258f0
Signed-off-by: Eugene Yasman <eyasman@codeaurora.org>
diff --git a/arch/arm/boot/dts/apq8074-dragonboard.dtsi b/arch/arm/boot/dts/apq8074-dragonboard.dtsi
index a8b3065..7f006f2 100644
--- a/arch/arm/boot/dts/apq8074-dragonboard.dtsi
+++ b/arch/arm/boot/dts/apq8074-dragonboard.dtsi
@@ -14,6 +14,10 @@
 /include/ "msm8974-camera-sensor-dragonboard.dtsi"
 /include/ "msm8974-leds.dtsi"
 
+&vph_pwr_vreg {
+	status = "ok";
+};
+
 &soc {
 	serial@f991e000 {
 		status = "ok";
@@ -62,6 +66,10 @@
 		#size-cells = <1>;
 		ranges;
 		smsc,reset-gpio = <&pm8941_gpios 8 0x00>;
+		/* Dragonboard has an always-on VBUS supply for HSIC hub,
+		 * providing a dummy regulator for the hub driver
+		 */
+		hub_vbus-supply = <&vph_pwr_vreg>;
 
 		hsic_host: hsic@f9a00000 {
 			compatible = "qcom,hsic-host";