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

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

This reverts commit 93f3e8b7a261d0645be240e4630d31c4d310c328 which is
commit fd568aebdc3c021175c1a55718c47805e0e6d4a5 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>