pvr: Handle sub_cmd flags.
This is based on top of !19371 (merged) which introduces the query flag.
The commits relevant to this MR are pvr: Handle PVR_SUB_COMMAND_FLAG_TRANSFER_SERIALIZE_WITH_FRAG
and later.
This is based on top of !19371 (merged) which introduces the query flag.
The commits relevant to this MR are pvr: Handle PVR_SUB_COMMAND_FLAG_TRANSFER_SERIALIZE_WITH_FRAG
and later.