xprt: remove redundant null check

'req' is dereferenced before checked for NULL.
The patch simply removes the check.

Signed-off-by: Jinqiu Yang<crindy646@gmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/xprt.c

@@ -202,10 +202,9 @@ int xprt_reserve_xprt(struct rpc_task *task)
 		goto out_sleep;
 	}
 	xprt->snd_task = task;
-	if (req) {
 	req->rq_bytes_sent = 0;
 	req->rq_ntrans++;
-	}
+
 	return 1;
 
 out_sleep: