fs/efivarfs/super.c: use static const for dentry_operations

...like other filesystems.
Signed-off-by: NFabian Frederick <fabf@skynet.be>
Cc: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

fs/efivarfs/super.c

@@ -83,7 +83,7 @@ static int efivarfs_d_hash(const struct dentry *dentry, struct qstr *qstr)
 	return 0;
 }
 
-static struct dentry_operations efivarfs_d_ops = {
+static const struct dentry_operations efivarfs_d_ops = {
 	.d_compare = efivarfs_d_compare,
 	.d_hash = efivarfs_d_hash,
 	.d_delete = always_delete_dentry,