ASoC: codecs: max98090: Allow dsp_a mode

ASoC: codecs: max98090: Allow dsp_a mode

TDM mode for max98090 is dsp_a compatible with such limitations:
1) Up to four timeslots supported.
2) Only 16 bits timeslots supported.
3) Only 2 active timeslots (L/R) supported.

We want to setup TDM mode only when dsp_a mode is selected. So move
M98090_REG_TDM_FORMAT/M98090_REG_TDM_CONTROL registers setup from
max98090_set_tdm_slot() to the max98090_dai_set_fmt(). Also extend
max98090_set_tdm_slot() with all TDM limitations check.

Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Link: https://lore.kernel.org/r/Message-Id:
Signed-off-by: Mark Brown <broonie@kernel.org>