msm: pil: Move all WCNSS clock and regulator proxy votes to PIL ops

The voting for clocks and regulators during WCNSS boot up/restart
was split across the WCNSS platform driver and the PIL ops. Move
all the proxy voting to PIL ops to consolidate the code and remove
unnecessary code. This also allows for future clean up patches that
consolidate the start/powerup and stop/shutdown subsystem ops.

Change-Id: I9808185b6b941228cdc4bb0f5293bedd04aed84d
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>