compile_pkgs: drop disabled packages

Disabled packages add unnecessary complexity and introduce no big gain. Furthermore they might and do hide if package is fixed by upstream.

There are two reason why package can be disabled. Either id does not compile because it is broken and in that case we should build it in hope that it will be fixed. Or it might be because it just does not apply on given board or architecture and in that case that package should be marked as incompatible with that architecture in package itself not somewhere outside.

On notice @mhrusecky