RDMA/ocrdma: Read ASIC_ID register to select asic_gen

ocrdma driver selects execution path based on sli_family and asic
generation number.  This introduces code to read the asic gen number
from pci register instead of obtaining it from the Emulex NIC driver.

Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Selvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/hw/ocrdma/ocrdma_verbs.c

@@ -267,7 +267,7 @@ static struct ocrdma_pd *_ocrdma_alloc_pd(struct ocrdma_dev *dev,
 
 	if (udata && uctx) {
 		pd->dpp_enabled =
-			dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY;
+			ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R;
 		pd->num_dpp_qp =
 			pd->dpp_enabled ? OCRDMA_PD_MAX_DPP_ENABLED_QP : 0;
 	}
@@ -1161,7 +1161,7 @@ err:
 static void ocrdma_set_qp_db(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
 			     struct ocrdma_pd *pd)
 {
-	if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+	if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
 		qp->sq_db = dev->nic_info.db +
 			(pd->id * dev->nic_info.db_page_size) +
 			OCRDMA_DB_GEN2_SQ_OFFSET;
@@ -1688,7 +1688,7 @@ static int ocrdma_copy_srq_uresp(struct ocrdma_dev *dev, struct ocrdma_srq *srq,
 	    (srq->pd->id * dev->nic_info.db_page_size);
 	uresp.db_page_size = dev->nic_info.db_page_size;
 	uresp.num_rqe_allocated = srq->rq.max_cnt;
-	if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+	if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
 		uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
 		uresp.db_shift = 24;
 	} else {