Add default config file for net4801 and 4826 and initial script
to copy config file like it is done for other platforms.
Patch from: kentarou matsuyama <matsuyama@thinktube.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25103 3c298f89-4303-0410-b956-a3cf2f4a3e73
