Add pmd802x amoled device and regulator devices ab, ibb and oled
under it along with the nvmem configuration needed to support the
IBB spur mitigation feature. This may be used by some customers.
Change-Id: I174ed6270da56bea7bb256af4f72b91bb059779d
Signed-off-by: Subbaraman Narayanamurthy <quic_subbaram@quicinc.com>