ARM: dts: msm: update CPR regulator properties to support msm8994v2

Modify the device tree properties for the APC0 and APC1
cpr-regulator devices in order to support msm8994v2 chips.
The new chip version supports an additional lower voltage corner,
SVS2, along with new higher CPU frequencies.

Change-Id: I65f1484fd89fff53952221daa766136abe51847f
Signed-off-by: David Collins <collinsd@codeaurora.org>