input: sensors: add board specific configration for BOSCH bma2x2

Add device tree and regulator control for BOSCH bma2x2
3-axis accelerometer.

CRs-fixed: 653165
Change-Id: I661e43b559190251dbaff4f26a1ccf004a708611
Signed-off-by: Oliver Wang <mengmeng@codeaurora.org>
Signed-off-by: Bingzhe Cai <bingzhec@codeaurora.org>