The previous implementation of this caused upower to select a thing
called 'flash_strobe' in the L5, which doesn't operate like a
flashlight. This changes the detection logic to look at the suffix, on
the pinephone the device ends in ':flash', and on the L5 it ends in
':torch'.
fixed#967
This patch is in purism's fork and it removes messages like this when
starting upower on the librem5 by properly detecting/setting the type:
TI:15:11:12 did not recognise USB path /sys/devices/platform/soc@0/30800000.bus/30a20000.i2c/i2c-0/0-003f/power_supply/tps6598x-source-psy-0-003f, please report
...
TI:15:11:12 did not recognise USB path /sys/devices/platform/soc@0/30800000.bus/30a50000.i2c/i2c-3/3-006a/power_supply/bq25890-charger, please report
