ASoC: pcm5102a: Make codec selectable

The TI PCM5102A codec driver can be used with the generic sound card
drivers, so it should be selectable. For example, with the addition
of #sound-dai-cells = <0> property in DT, it can be used with simple/graph
card drivers.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20201012141911.3150996-1-codrin.ciubotariu@microchip.com


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