ARM: dts: msm: Add APC voltage regulators for msm8992

Remove the stub regulators used for APC voltage rails and add the
SPM, MEM-ACC and CPR regulators that are needed for APC voltage
rails on msm8992.

Add CPR fuse parameters for target quotient, ring oscillator
selector and initial voltage for the corners as per the fuse
definitions for msm8992. Specify the fuse corners and virtual
corners for APC0/APC1 clusters based on the initial voltage plan.

Do not enable CPR operation by default for the CPR regulators
since the finalized parameter values are not yet available.

Change-Id: Ib1c3529b7d6e2ac253107b3ade3f473623433e05
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>