ASoC: dt-bindings: audio-graph-port: Add dai-tdm-slot-width-map

ASoC: dt-bindings: audio-graph-port: Add dai-tdm-slot-width-map

Some audio hardware cannot support a fixed slot width for all sample
widths, or a slot width equal to the sample width for all sample widths.
This is usually due either to limitations of the audio serial port or
system clocking restrictions.

This property allows setting a mapping of sample widths and the
corresponding tdm slot widths. The slot count is also provided for
each slot width - although this would almost always be the same for
all slot widths this allows for possibly adding extra padding slots
to maintain a fixed bitclock frequency.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220228172754.453783-2-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>