IB/uverbs: Fix leak of XRC target QPs

IB/uverbs: Fix leak of XRC target QPs

The real QP is destroyed in case of the ref count reaches zero, but
for XRC target QPs this call was missed and caused to QP leaks.

Let's call to destroy for all flows.

Orabug: 24761732

Fixes: 0e0ec7e0638e ('RDMA/core: Export ib_open_qp() to share XRC...')
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Noa Osherovich <noaos@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
(cherry picked from commit 5b810a242c28e1d8d64d718cebe75b79d86a0b2d)
Signed-off-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>