ARM: dts: dra7-evm: Add regulator information to USB2 PHYs

The ldousb_reg regulator provides power to the USB1 and USB2
High Speed PHYs.

Signed-off-by: Roger Quadros <[e-mail]>
Signed-off-by: Tony Lindgren <[e-mail]>

arch/arm/boot/dts/dra7-evm.dts

···
 		};
 	};
 };
+
+&usb2_phy1 {
+	phy-supply = <&ldousb_reg>;
+};
+
+&usb2_phy2 {
+	phy-supply = <&ldousb_reg>;
+};