vfs: move mnt_mountpoint to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namei.c b/fs/namei.c
index 2e9110a..87363aa 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -684,7 +684,7 @@
 	parent = mnt->mnt_parent;
 	if (&parent->mnt == path->mnt)
 		return 0;
-	mountpoint = mnt->mnt.mnt_mountpoint;
+	mountpoint = mnt->mnt_mountpoint;
 	path->dentry = mountpoint;
 	path->mnt = &parent->mnt;
 	return 1;
@@ -703,7 +703,7 @@
 		return 0;
 	}
 	mntget(&parent->mnt);
-	mountpoint = dget(mnt->mnt.mnt_mountpoint);
+	mountpoint = dget(mnt->mnt_mountpoint);
 	br_read_unlock(vfsmount_lock);
 	dput(path->dentry);
 	path->dentry = mountpoint;