ASoC: meson: axg-tdm-formatter: free reset on device removal

Use the devm variant to get the formatter reset so it is properly freed
on device removal

Fixes: 751bd5db ("ASoC: meson: axg-tdm-formatter: add reset")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20190820123413.22249-1-jbrunet@baylibre.com


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