usb: rockchip: remove duplicate assignement.

Assigning f_rkusb->reboot_flag twice doesn't make sense.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: NPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: NPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>

drivers/usb/gadget/f_rockusb.c

@@ -552,7 +552,6 @@ static void cb_reboot(struct usb_ep *ep, struct usb_request *req)
 				 sizeof(struct fsg_bulk_cb_wrap));
 	struct f_rockusb *f_rkusb = get_rkusb();
 
-	f_rkusb->reboot_flag = 0;
 	memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 	f_rkusb->reboot_flag = cbw->CDB[1];
 	rockusb_func->in_req->complete = compl_do_reset;