dt-bindings: qpnp-amoled: Skip changing IBB/AB configurations for AOD

As per the hardware recommendation, allow only PD control
configuration changes during regulator mode transition and
remove other register writes for AB/IBB peripherals during
AOD entry/exit or standby modes.

Since "qcom,aod-entry-poll-time-ms" is not needed anymore,
remove it.

Change-Id: I8109a40a0d24d0f32e62924dbbf7fefa804143b5
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>