usb: gadget: uvc: Add super-speed support to UVC webcam gadget

This patch adds super-speed support to UVC webcam gadget.

Also in this patch:
	- We add the configurability to pass bInterval, bMaxBurst, mult
	  factors for video streaming endpoint (ISOC IN) through module
	  parameters.

	- We use config_ep_by_speed helper routine to configure video
	  streaming endpoint.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/uvc.h b/drivers/usb/gadget/uvc.h
index ca4e03a..93b0c11 100644
--- a/drivers/usb/gadget/uvc.h
+++ b/drivers/usb/gadget/uvc.h
@@ -153,9 +153,11 @@
 
 	/* Descriptors */
 	struct {
-		const struct uvc_descriptor_header * const *control;
+		const struct uvc_descriptor_header * const *fs_control;
+		const struct uvc_descriptor_header * const *ss_control;
 		const struct uvc_descriptor_header * const *fs_streaming;
 		const struct uvc_descriptor_header * const *hs_streaming;
+		const struct uvc_descriptor_header * const *ss_streaming;
 	} desc;
 
 	unsigned int control_intf;