ASoC: rt5677: Remove magic number register writes

In order to simplify understanding what register values are being
written to the codec for debugging more advanced features (such as
hotwording) it is best to remove magic numbers

Signed-off-by: Curtis Malainey <cujomalainey@chromium.org>
Link: https://lore.kernel.org/r/20190906194636.217881-2-cujomalainey@chromium.org


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