msm: pil-venus: Decrease the proxy time out value

A smaller value of proxy time out (2 sec) is good enough for venus
driver to take over the control of the proxy voting resources.

Making proxy time out smaller also has the advantage that the venus
driver can do power collapse of the core sooner if needed to save
power.

Change-Id: I9bc1824de4817a565c908d5d7b8b61356d38d168
Signed-off-by: Tianyi Gou <tgou@codeaurora.org>