usb: gadget: add max_speed to usb_composite_driver

This field is used by the Gadget drivers to specify
the maximum speed they support, meaning: the maximum
speed they can provide descriptors for.

The driver speed will be set in consideration of this
value.

[ balbi@ti.com : dropped the ifdeffery ]

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 99830d6..a3e72df 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -240,6 +240,7 @@
  *	identifiers.
  * @strings: tables of strings, keyed by identifiers assigned during bind()
  *	and language IDs provided in control requests
+ * @max_speed: Highest speed the driver supports.
  * @needs_serial: set to 1 if the gadget needs userspace to provide
  * 	a serial number.  If one is not provided, warning will be printed.
  * @unbind: Reverses bind; called as a side effect of unregistering
@@ -267,6 +268,7 @@
 	const char				*iManufacturer;
 	const struct usb_device_descriptor	*dev;
 	struct usb_gadget_strings		**strings;
+	enum usb_device_speed			max_speed;
 	unsigned		needs_serial:1;
 
 	int			(*unbind)(struct usb_composite_dev *);