RDMA: Mark if destroy address handle is in a sleepable context

Introduce a 'flags' field to destroy address handle callback and add a
flag that marks whether the callback is executed in an atomic context or
not.

This will allow drivers to wait for completion instead of polling for it
when it is allowed.

Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/sw/rdmavt/ah.h

@@ -54,7 +54,7 @@ struct ib_ah *rvt_create_ah(struct ib_pd *pd,
 			    struct rdma_ah_attr *ah_attr,
 			    u32 create_flags,
 			    struct ib_udata *udata);
-int rvt_destroy_ah(struct ib_ah *ibah);
+int rvt_destroy_ah(struct ib_ah *ibah, u32 destroy_flags);
 int rvt_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr);
 int rvt_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr);