power_supply: update to the new registration scheme

The power_supply class in 4.4 kernel changes power_supply
registration to pass in a descriptor and a configuration
structure. Update msm power_supply registering drivers with
the new scheme.

Change-Id: Iaf63a96ab01f9d4676681ee4e6cf61ac2e8d3f4d
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>