sunxi: musb: Stop treating not having a vbus-det gpio as an error

On some boards the otg is wired up in host-only mode in this case we
have no vbus-det gpio.

Stop logging an error from sunxi_usb_phy_vbus_detect() in this case, and
stop treating sunxi_usb_phy_vbus_detect() returning a negative errno, as
if a charger is plugged into the otg port.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/cpu/armv7/sunxi/usb_phy.c b/arch/arm/cpu/armv7/sunxi/usb_phy.c
index 5e82ddc..4d63a74 100644
--- a/arch/arm/cpu/armv7/sunxi/usb_phy.c
+++ b/arch/arm/cpu/armv7/sunxi/usb_phy.c
@@ -237,10 +237,8 @@
 	struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
 	int err, retries = 3;
 
-	if (phy->gpio_vbus_det < 0) {
-		eprintf("Error: invalid vbus detection pin\n");
+	if (phy->gpio_vbus_det < 0)
 		return phy->gpio_vbus_det;
-	}
 
 	err = gpio_get_value(phy->gpio_vbus_det);
 	/*
diff --git a/drivers/usb/musb-new/sunxi.c b/drivers/usb/musb-new/sunxi.c
index 3542326..3a29b18 100644
--- a/drivers/usb/musb-new/sunxi.c
+++ b/drivers/usb/musb-new/sunxi.c
@@ -208,7 +208,7 @@
 
 	if (is_host_enabled(musb)) {
 		ret = sunxi_usb_phy_vbus_detect(0);
-		if (ret) {
+		if (ret == 1) {
 			printf("A charger is plugged into the OTG: ");
 			return -ENODEV;
 		}