ASoC: fsl_sai: Add support for imx8qm

SAI module on imx8qm features a register map similar with imx6 series
(it doesn't have VERID and PARAM registers at the beginning
of address spece).

Also, it has one FIFO which can help up to 64 * 32 bit samples.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20190814082911.665-2-daniel.baluta@nxp.com


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