RDMA/cxgb4: Remove the query_pkey callback

Now that the query_pkey() isn't mandatory by the RDMA core for iwarp
providers, this callback can be removed.

Link: https://lore.kernel.org/r/20200714183414.61069-6-kamalheib1@gmail.comSigned-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/cxgb4/provider.c

@@ -236,14 +236,6 @@ static int c4iw_allocate_pd(struct ib_pd *pd, struct ib_udata *udata)
 	return 0;
 }
 
-static int c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
-			   u16 *pkey)
-{
-	pr_debug("ibdev %p\n", ibdev);
-	*pkey = 0;
-	return 0;
-}
-
 static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index,
 			  union ib_gid *gid)
 {
@@ -317,7 +309,6 @@ static int c4iw_query_port(struct ib_device *ibdev, u8 port,
 	    IB_PORT_DEVICE_MGMT_SUP |
 	    IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
 	props->gid_tbl_len = 1;
-	props->pkey_tbl_len = 1;
 	props->max_msg_sz = -1;
 
 	return ret;
@@ -439,7 +430,6 @@ static int c4iw_port_immutable(struct ib_device *ibdev, u8 port_num,
 	if (err)
 		return err;
 
-	immutable->pkey_tbl_len = attr.pkey_tbl_len;
 	immutable->gid_tbl_len = attr.gid_tbl_len;
 
 	return 0;
@@ -503,7 +493,6 @@ static const struct ib_device_ops c4iw_dev_ops = {
 	.post_srq_recv = c4iw_post_srq_recv,
 	.query_device = c4iw_query_device,
 	.query_gid = c4iw_query_gid,
-	.query_pkey = c4iw_query_pkey,
 	.query_port = c4iw_query_port,
 	.query_qp = c4iw_ib_query_qp,
 	.reg_user_mr = c4iw_reg_user_mr,