The hwid check was wrong, causing the AR71XX_MODEL value to end with a
space (as $hwver was unset).
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Backport of r47553
git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@48844 3c298f89-4303-0410-b956-a3cf2f4a3e73