NFSv4: remove obviously bogus comparison from decode_getacl

We just set *acl_len to zero, and attrlen is unsigned, so this comparison
is clearly bogus.  I have no idea what I was thinking.

Fixes a bug that caused getacl to fail over krb5p.
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/nfs4xdr.c

@@ -3350,8 +3350,7 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
 					attrlen, recvd);
 			return -EINVAL;
 		}
-		if (attrlen <= *acl_len)
-			xdr_read_pages(xdr, attrlen);
+		xdr_read_pages(xdr, attrlen);
 		*acl_len = attrlen;
 	} else
 		status = -EOPNOTSUPP;