ACPI: battery: make internal names consistent with battery "state"

Cleanup -- No functional changes.

Battery state is currently exported in a proc "state" file.
Update associated #defines and routines to be consistent.

Signed-off-by: Vladimir Lebedev <vladimir.p.lebedev@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
1 file changed