Remove recipes for not yet migrated boards. Drop variables which aren't
required due to the switch to devicetree like boardname.
Drop the legacy image build code. Boards added to this target shouldn't
use the legacy image build code anyway.
Signed-off-by: Mathias Kresin <dev@kresin.me>
This target aims to replace ar71xx mid-term. The big part that is still
missing is making the MMIO/AHB wifi work using OF. NAND and mikrotik
subtargets will follow.
Signed-off-by: John Crispin <john@phrozen.org>