soc: qcom: Add snapshot of SMP2P Sleepstate driver

This is a snapshot of the SMP2P Sleepstate driver taken as of msm-4.9
commit <37023fd547ab> (Merge "msm: ipa: Fix compilation error with
CONFIG_RMNET_IPA=n" into msm-4.9).

Change-Id: If2af8b8011c7ee99991c119ff5477456fe8b466d
Signed-off-by: Chris Lew <clew@codeaurora.org>