ASoC: fsl_sai: separate set_tdm_slot() for tx and rx

The transmitter and receiver of SAI can be used for different slot number
and slot width configuration, so refine fsl_sai_set_dai_tdm_slot(), add
fsl_sai_set_dai_tdm_slot_tx() for tx and fsl_sai_set_dai_tdm_slot_rx()
for rx.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20250328085744.1893434-5-shengjiu.wang@nxp.com


Signed-off-by: Mark Brown <broonie@kernel.org>