usb: host/sl811-hcd: 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/host/sl811-hcd.c

@@ -1554,7 +1554,7 @@ sl811h_start(struct usb_hcd *hcd)
 
 /*-------------------------------------------------------------------------*/
 
-static struct hc_driver sl811h_hc_driver = {
+static const struct hc_driver sl811h_hc_driver = {
 	.description =		hcd_name,
 	.hcd_priv_size =	sizeof(struct sl811),