regulator: cpr3-hmss-regulator: add support for msm8996pro differences

The lower Turbo fuse corner reference voltage for speed bin 1
with CPR revision >= 5 only applies to MSM8996v3 chips.  It
should not be used on MSM8996-Pro chips.  Therefore, add support
to distinguish MSM8996v3 from MSM8996-Pro and add a V3 check
to the reference voltage selection logic.

Change-Id: Iae7d49fe1b2539727160649cbf60ce57b73d639e
Signed-off-by: David Collins <collinsd@codeaurora.org>