usb: gadget: replace usb_gadget::is_dualspeed with max_speed

This commit replaces usb_gadget's is_dualspeed field with
a max_speed field.

[ balbi@ti.com : Fixed DWC3 driver ]

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 1d3a675..98dc306 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -477,8 +477,8 @@
  *	driver setup() requests
  * @ep_list: List of other endpoints supported by the device.
  * @speed: Speed of current connection to USB host.
- * @is_dualspeed: True if the controller supports both high and full speed
- *	operation.  If it does, the gadget driver must also support both.
+ * @max_speed: Maximal speed the UDC can handle.  UDC must support this
+ *      and all slower speeds.
  * @is_otg: True if the USB device port uses a Mini-AB jack, so that the
  *	gadget driver must provide a USB OTG descriptor.
  * @is_a_peripheral: False unless is_otg, the "A" end of a USB cable
@@ -518,7 +518,7 @@
 	struct usb_ep			*ep0;
 	struct list_head		ep_list;	/* of usb_ep */
 	enum usb_device_speed		speed;
-	unsigned			is_dualspeed:1;
+	enum usb_device_speed		max_speed;
 	unsigned			is_otg:1;
 	unsigned			is_a_peripheral:1;
 	unsigned			b_hnp_enable:1;
@@ -549,7 +549,7 @@
 static inline int gadget_is_dualspeed(struct usb_gadget *g)
 {
 #ifdef CONFIG_USB_GADGET_DUALSPEED
-	/* runtime test would check "g->is_dualspeed" ... that might be
+	/* runtime test would check "g->max_speed" ... that might be
 	 * useful to work around hardware bugs, but is mostly pointless
 	 */
 	return 1;
@@ -567,7 +567,7 @@
 {
 #ifdef CONFIG_USB_GADGET_SUPERSPEED
 	/*
-	 * runtime test would check "g->is_superspeed" ... that might be
+	 * runtime test would check "g->max_speed" ... that might be
 	 * useful to work around hardware bugs, but is mostly pointless
 	 */
 	return 1;