SUNRPC: remove an unneeded NULL check in xprt_connect()

We check "task->tk_rqstp" and then we dereference it without checking on
the next line.  The only caller is call_connect() and that has a check
which prevents it from calling xprt_connect() with a NULL.

                if (task->tk_status < 0)
                        return;

If "task->tk_rqstp" were NULL then "tk_status" would be -EAGAIN.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/xprt.c

@@ -715,9 +715,7 @@ void xprt_connect(struct rpc_task *task)
 	if (xprt_connected(xprt))
 		xprt_release_write(xprt, task);
 	else {
-		if (task->tk_rqstp)
-			task->tk_rqstp->rq_bytes_sent = 0;
-
+		task->tk_rqstp->rq_bytes_sent = 0;
 		task->tk_timeout = task->tk_rqstp->rq_timeout;
 		rpc_sleep_on(&xprt->pending, task, xprt_connect_status);