RDMA/rtrs: client: Fix function return on success

Remove the if-statement and return the value contained in _err_,
unconditionally.

Link: https://lore.kernel.org/r/20200519163612.GA6043@embeddedor
Addresses-Coverity-ID: 1493753 ("Identical code for different branches")
Fixes: 6a98d71d ("RDMA/rtrs: client: main functionality")
Signed-off-by: NGustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: NBart Van Assche <bvanassche@acm.org>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/ulp/rtrs/rtrs-clt.c

@@ -1590,9 +1590,6 @@ static int create_con_cq_qp(struct rtrs_clt_con *con)
 	 * In case of error we do not bother to clean previous allocations,
 	 * since destroy_con_cq_qp() must be called.
 	 */
-
-	if (err)
-		return err;
 	return err;
 }