ARM: dts: msm: enable VDD_GFX CPR aging adjustments for msmcobalt v2

Enable VDD_GFX CPR aging adjustments for MSMCOBALTv2 parts with
CPR fusing revision greater than or equal to 2.  At most 15 mV
can be added onto the open-loop and closed-loop voltage as a
result of an aging measurement at runtime.  This maximum 15 mV
adjustment was previously accounted for in the fixed open-loop
and closed-loop voltage adjustments.  Therefore, remove 15 mV
from both the open-loop and closed-loop voltage adjustments for
all corners.

Change-Id: I44487bfcb4e21d76948cd836ad2dae18bc3d22f4
CRs-Fixed: 1081084
Signed-off-by: David Collins <collinsd@codeaurora.org>