Adding USB charge current property in the Linux Battery core

[ashishj3]

Hi,

For a better performance in USB charging operation, the DA9052/53 charging
current can be configured in accordance with the USB host current
delivering capacity (known through USB drivers negotiation).
 
To implement this useful feature, a new writable property "USB charge current"
needs to be added in the Linux battery core.

Let me know your views on it.

Regards,
Ashish