f2fs: fix to avoid unneeded unlock_new_inode

During ->lookup, I_NEW state of inode was been cleared in f2fs_iget,
so in error path, we don't need to clear it again.

Signed-off-by: Chao Yu <[e-mail]>
Signed-off-by: Jaegeuk Kim <[e-mail]>

fs/f2fs/namei.c

···
 			!fscrypt_has_permitted_context(dir, inode)) {
 		bool nokey = f2fs_encrypted_inode(inode) &&
 			!fscrypt_has_encryption_key(inode);
-		iput(inode);
-		return nokey ? ERR_PTR(-ENOKEY) : ERR_PTR(-EPERM);
+		err = nokey ? -ENOKEY : -EPERM;
+		goto err_out;
 	}
 	return d_splice_alias(inode, dentry);
 
 err_out:
-	iget_failed(inode);
+	iput(inode);
 	return ERR_PTR(err);
 }