/etc/uci-defaults/02_network had a typo, making it generate the wrong
network config.

Closes #20407.

Backport of r46727.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@46728 3c298f89-4303-0410-b956-a3cf2f4a3e73