mpls: Refactor how the mpls module is built

This refactoring is needed to allow more than just mpls gso
support to be built into the mpls moddule.

Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
2 files changed