ARM: dts: msm: Update APC CPR voltage adjustments for msm8920

Update APC CPR static open-loop and closed-loop voltage margins
for msm8920 parts as per recent voltage characterization results.

CRs-Fixed: 1107840
Change-Id: Ibebbf1417a8a00c6c740e60dde17be903b2a6685
Signed-off-by: Tirupathi Reddy <tirupath@codeaurora.org>