mailbox: constify mbox_chan_ops structure

Author: Julia Lawall <Julia.Lawall@lip6.fr>

This mbox_chan_ops structure is never modified, so declare it as const,
like all the other mbox_chan_ops structures.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall 
Signed-off-by: Jassi Brar 
---
 drivers/mailbox/mailbox-sti.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/drivers/mailbox/mailbox-sti.c b/drivers/mailbox/mailbox-sti.c
index 4835817..2394cfe 100644
--- a/drivers/mailbox/mailbox-sti.c
+++ b/drivers/mailbox/mailbox-sti.c
@@ -384,7 +384,7 @@ static struct mbox_chan *sti_mbox_xlate(struct mbox_controller *mbox,
 	return chan;
 }
 
-static struct mbox_chan_ops sti_mbox_ops = {
+static const struct mbox_chan_ops sti_mbox_ops = {
 	.startup	= sti_mbox_startup_chan,
 	.shutdown	= sti_mbox_shutdown_chan,
 	.send_data	= sti_mbox_send_data,