msm: npu: Support cx ipeak limit management

This change is to support cx ipeak limit management in order to
allow sysmon to limit cx currrent by adjusting npu power level.

Change-Id: I2743958977f69af4567040ee7e7ee4d8abfcde1f
Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>