input: misc: enable mma8x5x interrupt mode

Allow mma8x5x accelerometer work on interrupt mode and issue
interrupt to wake up application processor when data is ready.

Change-Id: Iadecfa9aeaa8e225098d049659802dcd7f976f48
Signed-off-by: Bingzhe Cai <bingzhec@codeaurora.org>