usb: renesas_usbhs: constify hc_driver structures

The hc_driver structure is only passed as the first argument to
usb_create_hcd, which is declared as const.  Thus the hc_driver structure
itself can be const.

Done with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/renesas_usbhs/mod_host.c

@@ -1285,7 +1285,7 @@ static int usbhsh_bus_nop(struct usb_hcd *hcd)
 	return 0;
 }
 
-static struct hc_driver usbhsh_driver = {
+static const struct hc_driver usbhsh_driver = {
 	.description =		usbhsh_hcd_name,
 	.hcd_priv_size =	sizeof(struct usbhsh_hpriv),