i2c: xiic: Remove some dead code

wait_for_completion_timeout() never returns negative value.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-xiic.c

@@ -1174,10 +1174,6 @@ static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 		i2c->rx_msg = NULL;
 		i2c->nmsgs = 0;
 		err = -ETIMEDOUT;
-	} else if (err < 0) {	/* Completion error */
-		i2c->tx_msg = NULL;
-		i2c->rx_msg = NULL;
-		i2c->nmsgs = 0;
 	} else {
 		err = (i2c->state == STATE_DONE) ? num : -EIO;
 	}