Also move it to an earlier place so new boards added are less likely
to confuse quilt.

Fixes #19965.

Backport of r46148.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@46153 3c298f89-4303-0410-b956-a3cf2f4a3e73