const: constify remaining dev_pm_ops

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/net/smsc911x.c b/drivers/net/smsc911x.c
index 20d6095..494cd91 100644
--- a/drivers/net/smsc911x.c
+++ b/drivers/net/smsc911x.c
@@ -2154,7 +2154,7 @@
 	return (to == 0) ? -EIO : 0;
 }
 
-static struct dev_pm_ops smsc911x_pm_ops = {
+static const struct dev_pm_ops smsc911x_pm_ops = {
 	.suspend	= smsc911x_suspend,
 	.resume		= smsc911x_resume,
 };