board: ¿Offline charging fix?

By reading this:
http://goo.gl/BuQx2B

Which is pretty similar to my device implementation:
http://goo.gl/wv1KRy

I think you can use this to make offline charging to work:
http://review.cyanogenmod.org/#/c/51718/1

This should be used if your kernel doesn't do it over a sysfs path.
Not tested at all since I don't own this device, just found that your last issue was this one and wanted to suggest something that worked for me :)