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Continue refactoring the microphone detect handling by factoring out the handling for microphone detection and button detection into separate functions. This both makes the code a little clearer and prepares for some planned future refactoring to make the state handling in the driver more explicit. Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>