ARM: dts: msm: update VDD_GFX CPR voltage adjustments for msm8996pro

Update the VDD_GFX CPR open-loop and closed-loop voltage
adjustments for MSM8996-Pro chips based upon characterization
results.  This ensures stability and minimum power consumption.

Change-Id: I89b79f92bcb4cc54a050f8b0ba17f76ff471838f
CRs-Fixed: 989555
Signed-off-by: David Collins <collinsd@codeaurora.org>