msm: cpr: Define Vmin based on fused bits in MSM

As per chip charactrization data, it is observed that
minimum voltage requirement is variable and should be
based on the fused bits as per chip characteristics.

Change-Id: Ic6cc8512185657f7901a64b8d30407c2398112fa
Signed-off-by: Kaushal Kumar <kaushalk@codeaurora.org>