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/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index 6532ed8..668a057 100644
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -323,7 +323,7 @@
 	return monwriter_restore(dev);
 }
 
-static struct dev_pm_ops monwriter_pm_ops = {
+static const struct dev_pm_ops monwriter_pm_ops = {
 	.freeze		= monwriter_freeze,
 	.thaw		= monwriter_thaw,
 	.restore	= monwriter_restore,