debugfs: make __create_file static

It's only used locally, no need to pollute global namespace.
Signed-off-by: NChris Wright <chrisw@sous-sol.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/debugfs/inode.c

@@ -291,9 +291,9 @@ static struct file_system_type debug_fs_type = {
 	.kill_sb =	kill_litter_super,
 };
 
-struct dentry *__create_file(const char *name, umode_t mode,
-				   struct dentry *parent, void *data,
-				   const struct file_operations *fops)
+static struct dentry *__create_file(const char *name, umode_t mode,
+				    struct dentry *parent, void *data,
+				    const struct file_operations *fops)
 {
 	struct dentry *dentry = NULL;
 	int error;