RDMA/siw: Release xarray entry

stable inclusion
from stable-5.10.40
commit 15357010e0e155b61bb60bddcd6dad6c0430eabc
bugzilla: 51882
CVE: NA

--------------------------------

[ Upstream commit a3d83276 ]

The xarray entry is allocated in siw_qp_add(), but release was
missed in case zero-sized SQ was discovered.

Fixes: 661f3859 ("RDMA/siw: Fix handling of zero-sized Read and Receive Queues.")
Link: https://lore.kernel.org/r/f070b59d5a1114d5a4e830346755c2b3f141cde5.1620560472.git.leonro@nvidia.com


Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Bernard Metzler <bmt@zurich.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>