usb: gadget: fix possible regression introduced with ep->claimed
usb: gadget: fix possible regression introduced with ep->claimed

This patch fixes possible regression introduced by
patch reworking endpoint claiming mechanism. It restores
setring ep->driver_data to NULL in usb_ep_autoconfig_reset(),
which was removed by patch commit cc476b42a39d.

Fixes: cc476b42a39d ("usb: gadget: encapsulate endpoint
	claiming mechanism")
Reported-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>
Signed-off-by: Robert Baldyga <72b1db3d98bf139199de36aba5da00140727c571@samsung.com>
Signed-off-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs