RDMA/core: Remove {create,destroy}_ah from mandatory verbs

{create,destroy}_ah aren't mandatory verbs, because not all providers
are implementing them.

Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/device.c

@@ -105,8 +105,6 @@ static int ib_device_check_mandatory(struct ib_device *device)
 		IB_MANDATORY_FUNC(query_pkey),
 		IB_MANDATORY_FUNC(alloc_pd),
 		IB_MANDATORY_FUNC(dealloc_pd),
-		IB_MANDATORY_FUNC(create_ah),
-		IB_MANDATORY_FUNC(destroy_ah),
 		IB_MANDATORY_FUNC(create_qp),
 		IB_MANDATORY_FUNC(modify_qp),
 		IB_MANDATORY_FUNC(destroy_qp),