ARM: dts: msm: update APC CPR voltage margins for msm8940

Update APC CPR open-loop and closed-loop voltage margins
for msm8940 based on voltage characterization results.

CRs-Fixed: 1053171
Change-Id: Id5e2f6e918354241c1a21629d5b63a2241aebf58
Signed-off-by: Tirupathi Reddy <tirupath@codeaurora.org>