ALSA: firewire-lib: fix kerneldoc errors

Complete missing parameters, correct wrong reference, and add an explaination
about the differences between the latest specification and our implementation.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Merge branch 'for-next'