This commit adds correct model detection for UniFi
AC-Mesh. Previously said device was incorrectly detected
as UniFi AC-Lite.
The Information about the device is stored at 0xC in the EEPROM
partition. It corresponds to the sysid in /etc/board.info of the
Ubiquiti stock firmware.
Signed-off-by: David Bauer <mail@david-bauer.net>