ASoC: dmic: Add support for DSD data format

Add DSD format support in this generic dmic driver:
DSD_U8,
DSD_U16_LE,
DSD_U32_LE,

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1650251910-8932-1-git-send-email-shengjiu.wang@nxp.com


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