ASoC: dapm: Remove SND_SOC_DAPM_MICBIAS_E()

There are no users any more and new drivers should be using supply widgets
which fully replace it anyway.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Zeng Zhaoming <zengzm.kernel@gmail.com>
1 file changed