Add support for detecting TP-Link Pharos v2 boards.
They use different format in product-info partition than v1 boards.
Code was written mostly by Alexander Couzens <lynxis@fe80.eu>
Signed-off-by: Robert Marko <robimarko@gmail.com>
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>