[MIPS]: constify function pointer tables

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/basler/excite/excite_iodev.c

@@ -48,7 +48,7 @@ static DECLARE_WAIT_QUEUE_HEAD(wq);
 
 
 
-static struct file_operations fops =
+static const struct file_operations fops =
 {
 	.owner		= THIS_MODULE,
 	.open		= iodev_open,