Using the BOARD_NAME variable results for both er and erlite devices to
identify themselfs as `er` and `erlite` (via `ubus call system board`).
This is problematic when devices search for firmware upgrades since the
OpenWrt profile is actually called `ubnt_edgerouter` and
`ubnt_edgerouter-lite`.
By adding the `SUPPORTED_DEVICE` a mapping is created to point devices
called `er` or `erlite` to the corresponding profile.
FIXES: https://github.com/openwrt/asu/issues/348
Signed-off-by: Paul Spooren <mail@aparcar.org>
(cherry picked from commit 2a07270180ed0e295d854d6e9e59c78c40549efc)
f94b30d83c