msm: pil: Hook into subsystem framework

The subsystem framework is going to replace the PIL framework in
the near future. Hook up drivers that don't have subsystem
restart counterparts into the subsystem framework so that we can
migrate all callers of pil_get/put into their subsystem
equivalents.

Change-Id: I45f771861d3430117c224b22b64f7d4bf3c6428e
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>