MAKEALL: cut down on duplication of targets

MAKEALL: cut down on duplication of targets

Merge the other significant source of board name duplication with the new
boards.cfg file.  I cleaned up most targets, but the ARM and MIPS trees
are such a mess than I didn't bother.  If those maintainers care, they can
take are of it.

While we're at it, we can be a bit more clever in the LIST_xxx handling
and avoid duplicating the list names too.

Signed-off-by: Mike Frysinger <[email protected]>
Reviewed-by: Ben Gardiner <[email protected]>
Tested-by: Thomas Chou <[email protected]>