Some device might not use the mic_bias_en. So use mic_bias_en only if gpio is valid. Change-Id: I7f55a960191ed154d4cfdda7647d81c41653eced
Some device might not use the mic_bias_en. So use mic_bias_en only if gpio is valid. Change-Id: I7f55a960191ed154d4cfdda7647d81c41653eced