This patch fixes following missing bits:
- add missing 'compatible' property on firmware partition
- set vendor partition 'userconfig' read-only
Fixes: 30dcbc741d84 ("ath79: add support for EnGenius ECB1750")
Signed-off-by: Sven Friedmann <sf.openwrt@okay.ms>
Signed-off-by: Petr Štetiar <ynezz@true.cz>