ALSA: firewire: Convert to snd_card_new() with a device pointer

Also remove superfluous snd_card_set_dev() calls.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --cc sound/firewire/dice.c
Simple merge

diff --cc sound/firewire/isight.c
Simple merge

diff --cc sound/firewire/scs1x.c
Simple merge

diff --cc sound/firewire/speakers.c
Simple merge