ASoC: Rename tlv320aic31xx-micbias.h as tlv320aic31xx.h

Let's use a more generic name, so other definitions for tlv320aic31xx
can be included.

Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220117132109.283365-2-ariel.dalessandro@collabora.com


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