replaced injected preprocessor flag __TARGET_BM__ with __TARGET_BMV2__
replaced injected preprocessor flag __TARGET_BM__ with __TARGET_BMV2__

hanw/p4c-bm,hanw/p4c-bm,ops-p4/ops-p4c,ops-p4/ops-p4c,hanw/p4c-bm,p4lang/p4c-bm,ops-p4/ops-p4c,p4lang/p4c-bm,p4lang/p4c-bm,ops-p4/ops-p4c,hanw/p4c-bm