mako: clean up mako specific codes

- cyts is cypress touch codes, so mako doesn't need it
- mako doesn't use SMB349 charger and CS8427 asoc
- not use machine_is_apq8064_mako()
- not check i2c machs
- define i2c_registry at board-mako.h

Change-Id: I57610ad90084b2c680e428f70bca34cd8a86ec76