input: misc: Add snapshot of QTI haptics driver

QTI haptics driver adds support for configuring the haptics module
in QTI PMICs based on per-effect configuration defined by the user
through device tree.

This snapshot is taken as of msm-4.14
commit 9bb584ae3a9d ("msm/sde/rotator: Add rev checks for sdmmagpie").

This change also splits qti_haptics_parse_dt() to fix cyclomatic
complexity warnings.

Change-Id: Icb1ae5eb7795dc61b41e34027fbc7b98583bcbec
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>