const: constify remaining file_operations

[akpm@linux-foundation.org: fix KVM]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/phantom.c b/drivers/misc/phantom.c
index fa57b67..90a95ce 100644
--- a/drivers/misc/phantom.c
+++ b/drivers/misc/phantom.c
@@ -271,7 +271,7 @@
 	return mask;
 }
 
-static struct file_operations phantom_file_ops = {
+static const struct file_operations phantom_file_ops = {
 	.open = phantom_open,
 	.release = phantom_release,
 	.unlocked_ioctl = phantom_ioctl,