power: power_supply: add property for sw based JEITA

Add power_supply property to enable/disable software based
JEITA charging.

Change-Id: I9fca73c1de524e78c3df83b02a9f5a64488eaae0
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>