ASoC: dt-bindings: add bindings for TI TAS5805M.

The TAS5805M is a class D speaker amplifier with integrated DSP.
Configuration must be generated by TI's PPC3 tool and supplied as a
firmware image.

Signed-off-by: Daniel Beer <daniel.beer@igorinstitute.com>
Link: https://lore.kernel.org/r/e271d381dcf1c6036a2a22bab6ab72654455aa58.1642298336.git.daniel.beer@igorinstitute.com


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