regulator: cpr-regulator: add support for all possible quotient scaling

Add support for CPR target quotient scaling for the virtual
corners between all adjacent pairs of fuse corners.  Currently
target quotient scaling only occurs for the virtual corners that
fall between the highest and second highest fuse corners.

This modification ensures that further power savings are
possible on boards that have multiple virtual corners associated
with the lower fuse corners.

Change-Id: I078f32557531ffb8305d8e7e8225658da821aef4
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
Signed-off-by: David Collins <collinsd@codeaurora.org>