ARM: dts: msm: increase VDD_GFX Fmax CPR ceiling voltage for MSM8998v2

Increase the VDD_GFX CPR 710 MHz (Fmax) corner ceiling voltage
from 1024 mV to 1088 mV.  This ensures that parts requiring
higher voltages operate correctly.

Also increase the aging reference voltage since it needs to
match the Fmax ceiling voltage.

Change-Id: I0799fe76c7a19d8fd97b6270b403b2994ea09a74
Signed-off-by: David Collins <collinsd@codeaurora.org>