dt-bindings: tas2562: Add TAS2564 to binding

Add the TAS2564 compatible and data sheet link to the binding.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200918150130.21015-1-dmurphy@ti.com


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