sunxi: Add support for USB vbus pin for USB3

The H3 has USB0 - USB3, add support for having a USB vbus pin for USB3.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

arch/arm/cpu/armv7/sunxi/usb_phy.c

@@ -76,6 +76,7 @@ static int get_vbus_gpio(int index)
 	case 0: return sunxi_name_to_gpio(CONFIG_USB0_VBUS_PIN);
 	case 1: return sunxi_name_to_gpio(CONFIG_USB1_VBUS_PIN);
 	case 2: return sunxi_name_to_gpio(CONFIG_USB2_VBUS_PIN);
+	case 3: return sunxi_name_to_gpio(CONFIG_USB3_VBUS_PIN);
 	}
 	return -EINVAL;
 }

board/sunxi/Kconfig

@@ -342,6 +342,12 @@ config USB2_VBUS_PIN
 	---help---
 	See USB1_VBUS_PIN help text.
 
+config USB3_VBUS_PIN
+	string "Vbus enable pin for usb3 (ehci2)"
+	default ""
+	---help---
+	See USB1_VBUS_PIN help text.
+
 config I2C0_ENABLE
 	bool "Enable I2C/TWI controller 0"
 	default y if MACH_SUN4I || MACH_SUN5I || MACH_SUN7I