Battery capacity fix

i9100 has battery capacity of 2100, n7000 has 2500.
This is a remnant of the ancient CM n7000 bringup when
i9100 device tree was used as a template.
Clean up system.prop typo

Replacing i9100 system.prop reference with n7000.
Merge pull request #4 from frantisheq/cm-11.0

Battery capacity and system.prop fix