libaltos: Map generic windows device names to actual names

When we signed the .ini file for our windows 'driver', IDs 28 and 2c
hadn't been assigned to EasyMega and EasyMotor, so that file has
generic 'AltusMetrum28' and 'AltusMetrum2c' instead. Updating that
file is 'hard', so just map the names in the driver instead.

Signed-off-by: Keith Packard <keithp@keithp.com>