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/watchdog/adx_wdt.c b/drivers/watchdog/adx_wdt.c
index 77afb0a..9c65944 100644
--- a/drivers/watchdog/adx_wdt.c
+++ b/drivers/watchdog/adx_wdt.c
@@ -314,7 +314,7 @@
 	return 0;
 }
 
-static struct dev_pm_ops adx_wdt_pm_ops = {
+static const struct dev_pm_ops adx_wdt_pm_ops = {
 	.suspend = adx_wdt_suspend,
 	.resume = adx_wdt_resume,
 };