RDMA/irdma: Remove the unused spin lock in struct irdma_qp_uk

The spin lock in struct irdma_qp_uk is not used. So remove it.

Link: https://lore.kernel.org/r/20211021230612.153812-1-yanjun.zhu@linux.devSigned-off-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/irdma/user.h

@@ -367,7 +367,6 @@ struct irdma_qp_uk {
 	bool rq_flush_complete:1; /* Indicates flush was seen and RQ was empty after the flush */
 	bool destroy_pending:1; /* Indicates the QP is being destroyed */
 	void *back_qp;
-	spinlock_t *lock;
 	u8 dbg_rq_flushed;
 	u8 sq_flush_seen;
 	u8 rq_flush_seen;

drivers/infiniband/hw/irdma/verbs.c

@@ -833,7 +833,6 @@ static int irdma_create_qp(struct ib_qp *ibqp,
 
 	qp = &iwqp->sc_qp;
 	qp->qp_uk.back_qp = iwqp;
-	qp->qp_uk.lock = &iwqp->lock;
 	qp->push_idx = IRDMA_INVALID_PUSH_PAGE_INDEX;
 
 	iwqp->iwdev = iwdev;