security: whitespace coding style fixes

Whitespace coding style fixes.

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/keys/proc.c b/security/keys/proc.c
index 9d01021..81bf98d 100644
--- a/security/keys/proc.c
+++ b/security/keys/proc.c
@@ -307,7 +307,7 @@
 static void *proc_key_users_next(struct seq_file *p, void *v, loff_t *_pos)
 {
 	(*_pos)++;
-	return key_user_next((struct rb_node *) v);
+	return key_user_next((struct rb_node *)v);
 }
 
 static void proc_key_users_stop(struct seq_file *p, void *v)