ASoC: stm32: sai: increase channels_max limit

The SAI peripheral supports up to 16 channels in TDM mode (8L+8R).
The driver currently supports TDM over two channels.
Increase SAI DAI playback/record channels_max,
to also allow up to 16 channels in TDM mode.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Link: https://lore.kernel.org/r/20211117110031.19345-1-olivier.moysan@foss.st.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/stm/stm32_sai_sub.c

@@ -1294,7 +1294,7 @@ static struct snd_soc_dai_driver stm32_sai_playback_dai = {
 		.id = 1, /* avoid call to fmt_single_name() */
 		.playback = {
 			.channels_min = 1,
-			.channels_max = 2,
+			.channels_max = 16,
 			.rate_min = 8000,
 			.rate_max = 192000,
 			.rates = SNDRV_PCM_RATE_CONTINUOUS,
@@ -1312,7 +1312,7 @@ static struct snd_soc_dai_driver stm32_sai_capture_dai = {
 		.id = 1, /* avoid call to fmt_single_name() */
 		.capture = {
 			.channels_min = 1,
-			.channels_max = 2,
+			.channels_max = 16,
 			.rate_min = 8000,
 			.rate_max = 192000,
 			.rates = SNDRV_PCM_RATE_CONTINUOUS,