ALSA: firewire-motu: fix stream format for MOTU 8pre FireWire

ALSA: firewire-motu: fix stream format for MOTU 8pre FireWire

commit fc36ef80ca2c68b2c9df06178048f08280e4334f upstream.

My previous refactoring for ALSA firewire-motu driver brought regression
to handle MOTU 8pre FireWire. The packet format is not operated correctly.

Cc: <stable@vger.kernel.org>
Fixes: dfbaa4dc11eb ("ALSA: firewire-motu: add model-specific table of chunk count")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210614083133.39753-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>