dt-bindings: qpnp-amoled: Add support to configure PD control in AOD

Add support to configure AB and IBB PD control for different
modes of operation in AOD through "qcom,aod-pd-control" property
under AB/IBB regulator subnodes.

Change-Id: Ice9c4117d61bd4235ece828fa0d45da11d73016e
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>