firewire: ohci: fulfill timestamp for some local asynchronous transaction

1394 OHCI driver generates packet data for the response subaction to the
request subaction to some local registers. In the case, the driver should
assign timestamp to them by itself.

This commit fulfills the timestamp for the subaction.

Cc: stable@vger.kernel.org
Fixes: dcadfd7f ("firewire: core: use union for callback of transaction completion")
Link: https://lore.kernel.org/r/20240429084709.707473-1-o-takashi@sakamocchi.jp


Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>