ASoC: meson: g12a-tohdmitx: require regmap mmio

The tohdmitx glue uses regmap MMIO so it should require it.

Fixes: c8609f38 ("ASoC: meson: add g12a tohdmitx control")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20190820123510.22491-1-jbrunet@baylibre.com


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