sh: constify function pointer tables

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/boards/landisk/gio.c b/arch/sh/boards/landisk/gio.c
index a37643d..1702508 100644
--- a/arch/sh/boards/landisk/gio.c
+++ b/arch/sh/boards/landisk/gio.c
@@ -121,7 +121,7 @@
 	return 0;
 }
 
-static struct file_operations gio_fops = {
+static const struct file_operations gio_fops = {
 	.owner = THIS_MODULE,
 	.open = gio_open,	/* open */
 	.release = gio_close,	/* release */