Currently eth1 is hardcoded as the expected interface switches in diagmode.
This patch replaces the eth1 with the ifname, and also directly tests if
the interface specified by ifname has a switch attached.
Signed-off-by: Jonas Gorski <jonas.gorski+openwrt@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24186 3c298f89-4303-0410-b956-a3cf2f4a3e73
74fd46691e