ALSA: firewire-motu: move spec data to v3 protocol file

The most of members in spec data is used in each protocol file. It's
better to capsulate the data to the file.

This commit moves the data to the file for protocol version 3.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20200519111641.123211-3-o-takashi@sakamocchi.jp


Signed-off-by: Takashi Iwai <tiwai@suse.de>