more and more users are getting confused by this, and consider it a regression in brcm47xx,
because brcm-2.4 was not showing this message. It's not particularly interesting for debugging,
most of the time it only happens because of an unconnected port.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22110 3c298f89-4303-0410-b956-a3cf2f4a3e73
