ALSA: firewire-lib: code refactoring for helper functions to pool sequence in rx packets

When scheduling transmission of rx packets, current implementation pools
sequence descriptors at first for media clock. Two methods are used for
the purpose depending on four cases, while the implementations do not
necessarily have good readability.

This commit refactors them by adding function pointers and functions
arguments.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20230107023214.29132-2-o-takashi@sakamocchi.jp


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