Add basic support for the internal ethernet switch on bcm6368. It behaves
as a dumb switch for now, but allows basic connectivity.
Also drop the ethernet patch for bcm6345 for now, it needs rework.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31129 3c298f89-4303-0410-b956-a3cf2f4a3e73
