staging: gdm724x: constify tty_port_operations structs

Author: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com>

Constifies tty_port_operations structure in
the tty code of the gdm724x driver since it
is not modified after its initialization.

Detected and found using Coccinelle.

Suggested-by: Julia Lawall 
Signed-off-by: Aya Mahfouz 
Signed-off-by: Greg Kroah-Hartman 
---
 drivers/staging/gdm724x/gdm_tty.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/drivers/staging/gdm724x/gdm_tty.c b/drivers/staging/gdm724x/gdm_tty.c
index e2c0f22..eb7e252 100644
--- a/drivers/staging/gdm724x/gdm_tty.c
+++ b/drivers/staging/gdm724x/gdm_tty.c
@@ -64,7 +64,7 @@ static void gdm_port_destruct(struct tty_port *port)
 	kfree(gdm);
 }
 
-static struct tty_port_operations gdm_port_ops = {
+static const struct tty_port_operations gdm_port_ops = {
 	.destruct = gdm_port_destruct,
 };