This change adds support the TAS5720A-Q1 audio codec, in the same driver as
tas5720.

Functionally, this driver is pretty similar to it's TAS5720x variant.

The first 3 registers are the same, so the main control and device
identification can happen with these registers.

The next registers differ.
This variant offers control (in the registers) for 2 speakers, which is
implemented here (in a basic manner).
Signed-off-by: Steffen Aschbacher <steffen.aschbacher@stihl.de>
Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>
Link: https://lore.kernel.org/r/20230128082744.41849-2-alex@shruggie.roSigned-off-by: Mark Brown <broonie@kernel.org>