of_batterydata: Add properties for step-chg/sw-jeita settings

Step charging and JEITA range settings may be different between battery
modules. Add properties to support step charging and JEITA settings for
different battery so that charger driver could apply these battery
specific settings accordingly.

Change-Id: Ibe6539ba66beba76595de1783ca988fe259424b2
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>