mixer_paths.xml: increase main mic capture volume

- Enable input PGA
- Set IN1L PGA gain to 20 (+13.5dB)
- Set MIXINL IN1L gain to 1 (+30dB)
- Copy ADC left channel to right

Change-Id: Ie1de9ead76ff77301ce4d89bee4262fe40bc9b84
1 file changed