ASoC: fsl_sai: Add support for more sample rates

Add support for more sample rates, because PDM format
bitstream has higher sample rates. for example DSD512
format, the bit clock is 22.5792MHz, if the word width
is U8_LE, then the max sample rate is 2822400.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1655451877-16382-4-git-send-email-shengjiu.wang@nxp.com


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