The part is a mono speaker amp, but it can do downmix and switch between
left and right channel, so the right channel range is 1 to 2.
(This mirrors commit 
bf54d97a835d ("ASoC: tas2770: Allow mono streams")
which was a fix to the tas2770 driver.)
Fixes: 827ed8a0fa50 ("ASoC: tas2764: Add the driver for the TAS2764")
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220825140241.53963-2-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
                .id = 0,
                .playback = {
                        .stream_name    = "ASI1 Playback",
-                       .channels_min   = 2,
+                       .channels_min   = 1,
                        .channels_max   = 2,
                        .rates      = TAS2764_RATES,
                        .formats    = TAS2764_FORMATS,