9p: use clone_fid()

in a bunch of places it cleans the things up

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index d4c5002..4491bca 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -28,11 +28,14 @@
 {
 	return v9fs_fid_lookup(dentry->d_parent);
 }
-struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
 void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
 struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
 static inline struct p9_fid *clone_fid(struct p9_fid *fid)
 {
 	return IS_ERR(fid) ? fid :  p9_client_walk(fid, 0, NULL, 1);
 }
+static inline struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
+{
+	return clone_fid(v9fs_fid_lookup(dentry));
+}
 #endif