input: sensors: add BOSCH bma2x2 accelerometer driver

Add BOSCH bma2x2 accelerometer driver to support sensors on
MSM8909.
This snapshot is taken as of msm-3.10 'commit 1227f5746677 ("soc:
qcom: smp2p: spinlock_test: Initialize work item")'

Change-Id: I0169725857887307f755b6fdf899e407d8ad74ad
Signed-off-by: Bingzhe Cai <bingzhec@codeaurora.org>