usb: pd: Add support for IIO based properties

Add IIO calls for the power supply properties that are
not supported by the current power supply framework.
Also, use the proper power supply object for the
property POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN.

Also IIO calls held mutex which causes possible deadlocks when
called from interrupt context, hence remove the IIO calls
from the psy_chnaged and move them to a different work.

Change-Id: I39d3806fd29f817a982d95d32313b82e9ec76117
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>