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/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c
index 7fcb0eb..f2d76da 100644
--- a/drivers/video/backlight/da903x_bl.c
+++ b/drivers/video/backlight/da903x_bl.c
@@ -177,7 +177,7 @@
 	return 0;
 }
 
-static struct dev_pm_ops da903x_backlight_pm_ops = {
+static const struct dev_pm_ops da903x_backlight_pm_ops = {
 	.suspend	= da903x_backlight_suspend,
 	.resume		= da903x_backlight_resume,
 };