msm: krait-regulator: add support for reduced coeff1 load

The krait cpu can be made to run in a state where the coeff1 component
of the load is reduced.

Create a separate regulator per cpu to indicate if the reduced load
state is active. Recompute the phase count when this state changes.

Change-Id: I1fc52698aebef6255fa0276f106d1e125da3f167
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>