Revert "xprtrdma: Fix regbuf data not freed in rpcrdma_req_create()"

This reverts commit bcebcb1 which is
commit 9181f40 upstream.

The backport to 5.4.y causes problems, as reported by Harshit, so revert
it for now and wait for a working backport to be added.

Reported-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Link: https://lore.kernel.org/r/4d2928e1-c836-b817-3dc2-3fe9adcaf2d6@oracle.com
Cc: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

net/sunrpc/xprtrdma/verbs.c

@@ -1037,7 +1037,6 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
 	kfree(req->rl_sendbuf);
 out3:
 	kfree(req->rl_rdmabuf);
-	rpcrdma_regbuf_free(req->rl_sendbuf);
 out2:
 	kfree(req);
 out1: