ALSA: oxfw: Add proc interface for debugging purpose

This commit adds proc interface to get information about stream
formation. This commit also adds snd_oxfw_stream_get_current_formation()
to get current stream formation.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --cc sound/firewire/oxfw/Makefile
Simple merge

diff --cc sound/firewire/oxfw/oxfw-proc.c
Simple merge

diff --cc sound/firewire/oxfw/oxfw-stream.c
Simple merge

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

diff --cc sound/firewire/oxfw/oxfw.h
Simple merge