RDMA/efa: Allow passing of optional access flags for MR registration

As part of adding a range of optional access flags that drivers need to be
able to accept, mask this range inside efa driver.  This will prevent the
driver from failing when an access flag from that range is passed.

Link: https://lore.kernel.org/r/1578506740-22188-8-git-send-email-yishaih@mellanox.comSigned-off-by: Michael Guralnik <michaelgur@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/efa/efa_verbs.c

@@ -1367,6 +1367,7 @@ struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
 		IB_ACCESS_LOCAL_WRITE |
 		(is_rdma_read_cap(dev) ? IB_ACCESS_REMOTE_READ : 0);
 
+	access_flags &= ~IB_UVERBS_ACCESS_OPTIONAL_RANGE;
 	if (access_flags & ~supp_access_flags) {
 		ibdev_dbg(&dev->ibdev,
 			  "Unsupported access flags[%#x], supported[%#x]\n",