constify a bunch of struct file_operations instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/media/rc/ir-lirc-codec.c b/drivers/media/rc/ir-lirc-codec.c
index 9945e5e..8ee080e 100644
--- a/drivers/media/rc/ir-lirc-codec.c
+++ b/drivers/media/rc/ir-lirc-codec.c
@@ -307,7 +307,7 @@
 	return;
 }
 
-static struct file_operations lirc_fops = {
+static const struct file_operations lirc_fops = {
 	.owner		= THIS_MODULE,
 	.write		= ir_lirc_transmit_ir,
 	.unlocked_ioctl	= ir_lirc_ioctl,