soc: qcom: Add snapshot of QTI PBS driver

QTI PBS (Programmable Boot Sequence) driver helps triggering
certain PBS on QTI PMICs when available for APPS.

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

Change-Id: I25b6f7cb2bf1cad1413c4389cd2e77e021016b3f
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>