soc: qcom: qpnp-haptic: Overhaul the driver

Currently, the driver does read-modify-write to registers in so
many places. It would be better to have a masked_write API to do
this. This also needs a change in the mask definitions used in
all places where these writes are made. Also, create separate
functions that deals with a particular configuration so that they
can be reused later.

Change-Id: Ice07297b1542640e82c7adc12d323258440edb77
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>