ASoC: fsl_hdmi/imx-hdmi-dma: Enable/fix 24bit audio output.

Since SNDRV_PCM_FORMAT_S24 uses 4 bytes, the constraint has to be set to 32.
Also we need to extend the parity calculation to full 32 bit.

Signed-off-by: Rudi <r.ihle@s-t.de>
ASoC: imx-hdmi-dma: Add support for mmap emulation when using 24bit samples.

Signed-off-by: Rudi <r.ihle@s-t.de>