ASoC: dt-bindings: tfa9879: Convert to dtschema

Convert the tfa9879 audio CODEC bindings to DT schema
No error/warning seen when running make dt_binding_check

Signed-off-by: Bragatheswaran Manickavel <bragathemanick0908@gmail.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230921183313.54112-1-bragathemanick0908@gmail.com


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