m4: another in-call speakerphone fix

Set "Voice CallVoice Speaker" to use CSVoice instead of Voice Stub.
Additionally, add an empty "Voice CallSpeaker DMIC Endfire" to prevent
fallback to "Voice Call" which screws up the routing again.
m4: fix mute mic in speakerphone
m4: use dual mic in speakerphone
m4: fix dualmic calibration ids
m4: Use correct kernel repo
m4: Remove gps header

* M4 is not building anything off this header
m4: Remove deprecated vold config