5e2600e: imx233: make microphone bias, bias pin and resistor configurable
This clearly fixes recording on targets where the bias pin was wrong. It may also improve recording on targets where the bias voltage was wrong. I was unable to find those parameters on the ZEN Mozaic, which fallback to default values.
For some reason, there was a mismatch between the setting (decibel) and the audiohw code (centicel). This resulted in a gain divided by 10. This may explain why some people experienced low volume with the mic on the fuze+.