nvme-rdma: call ops->reg_read64 instead of nvmf_reg_read64

To make the nvme_rdma_configure_admin_queue generic in preparation of
moving it to common code.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/host/rdma.c

@@ -777,7 +777,7 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
 	if (error)
 		goto out_cleanup_queue;
 
-	error = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP,
+	error = ctrl->ctrl.ops->reg_read64(&ctrl->ctrl, NVME_REG_CAP,
 			&ctrl->ctrl.cap);
 	if (error) {
 		dev_err(ctrl->ctrl.device,