ASoC: meson: add sm1 compatibles

Document the compatible strings of the audio devices of the sm1 SoC
family

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20190905120120.31752-2-jbrunet@baylibre.com


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