regulator: spm-regulator: add support to recalibrate after voltage changes

Some APSS hardware blocks require explicit recalibration whenever
the processor supply voltage changes.  Add support to
conditionally recalibrate this hardware via the secure world
based upon this device tree property: qcom,recal-mask.

Change-Id: I632459e36814fe0cdfb2761bc186b8b16ecdc775
Signed-off-by: David Collins <collinsd@codeaurora.org>