when battery_bench is run
exports a file in the rockbox directory called 'battery_levels.default'
if the user wants their own levels they can rename the file battery_levels.cfg
and it will be loaded at boot
some minimal error checking is performed prior to using the values
added manual entry
Change-Id: Ia0126faced0c7229fcf8385a1bcb584b5a9dc378
Show all the adc channels in the IO ports debug menu (not for as3525v2
since the channels are different)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26149 a1c6a512-1295-4272-9138-f99709370657
