ASoC: kirkwood-dma: remove channel restrictions

This is part of a patch found in Rabeeh Khoury's git tree for the
cubox.

With SPDIF passthrough, we are not restricted to just two channels of
audio; we can support however many channels the non-audio stream can
itself support.  In any case, kirkwood-dma is not involved in the
format selection.  So yet rid of this restriction.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/kirkwood/kirkwood-dma.c

@@ -29,7 +29,9 @@
 #define KIRKWOOD_FORMATS \
 	(SNDRV_PCM_FMTBIT_S16_LE | \
 	 SNDRV_PCM_FMTBIT_S24_LE | \
-	 SNDRV_PCM_FMTBIT_S32_LE)
+	 SNDRV_PCM_FMTBIT_S32_LE | \
+	 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | \
+	 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE)
 
 struct kirkwood_dma_priv {
 	struct snd_pcm_substream *play_stream;
@@ -48,7 +50,7 @@ static struct snd_pcm_hardware kirkwood_dma_snd_hw = {
 	.rate_min		= 8000,
 	.rate_max		= 384000,
 	.channels_min		= 1,
-	.channels_max		= 2,
+	.channels_max		= 8,
 	.buffer_bytes_max	= KIRKWOOD_SND_MAX_PERIOD_BYTES * KIRKWOOD_SND_MAX_PERIODS,
 	.period_bytes_min	= KIRKWOOD_SND_MIN_PERIOD_BYTES,
 	.period_bytes_max	= KIRKWOOD_SND_MAX_PERIOD_BYTES,