fs/9p: delete unnnecessary condition

We already know that "retval" is negative, so there is no need to check
again. Also the statement is not indented far enough. Delete it.

Signed-off-by: Dan Carpenter <[e-mail]>
Fixes: 43c36a56ccf6 ("Revert "fs/9p: Refresh metadata in d_revalidate for uncached mode too"")
Reviewed-by: Christian Schoenebeck <[e-mail]>
Message-ID: <[e-mail]>
Signed-off-by: Dominique Martinet <[e-mail]>

fs/9p/vfs_dentry.c

···
 			p9_debug(P9_DEBUG_VFS,
 				"refresh inode: dentry = %pd (%p), got error %pe\n",
 				dentry, dentry, ERR_PTR(retval));
-		if (retval < 0)
 			return retval;
 		}
 	}