ASoc: fsl_sai: Add pinctrl operation for PDM and DSD

With DSD format, the pinctrl is different compare with
I2S format, because one dataline only has one channel
data, and the codec always mux the LRCLK pin to DSD
data line, and on i.MX8MQ the BCLK pin can route to
codec on DSD case for the MCLK is too high.

Add pinctrl operation that the pinctrl can be switched
on runtime according to the I2S format or DSD format

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1655451877-16382-5-git-send-email-shengjiu.wang@nxp.com


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