IB/iser: Switch from dma_device to dev.parent

Prepare for removal of ib_device.dma_device.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/ulp/iser/iscsi_iser.c

@@ -659,7 +659,7 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
 			ib_conn->device->ib_device->attrs.max_fast_reg_page_list_len);
 
 		if (iscsi_host_add(shost,
-				   ib_conn->device->ib_device->dma_device)) {
+				   ib_conn->device->ib_device->dev.parent)) {
 			mutex_unlock(&iser_conn->state_mutex);
 			goto free_host;
 		}