ASoC: meson: axg-frddr: add sm1 support

On sm1, the output routing bits have moved to CTRL2 register

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20190905120120.31752-7-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>