UPSTREAM: ALSA: pcm: add IEC958 channel status helper for hw_params

UPSTREAM: ALSA: pcm: add IEC958 channel status helper for hw_params

Add IEC958 channel status helper that gets the audio properties from
snd_pcm_hw_params instead of snd_pcm_runtime. This is needed to
produce the channel status bits already in audio stream configuration
phase.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit 4a4436573a6669516f73bac25016683d396ed4c4)

Change-Id: Ie19500cd63fb311ec273035c336acc8c568d84db
Signed-off-by: Chris Zhong <zyw@rock-chips.com>