Commit
c5564d95c58f1f995cee12a6d6b5476ae92b27ed
by Pau Espin Pedrolipa: Store ASP IPA SLS into its own field
Storing the 4-bit SLS into asp_id field is a total hack which just
pollutes the code and makes it more difficult to understand.
Add a new field into ss7_asp to store that information cleanly.
Moreover, asp_id field itself is right now a total mess on its own,
since it is used both for local and remote ASP Identifiers at the same
time. This will be fixed in a follow-up commitset.
Change-Id: I6ec346417ceeabfce9c7b856040be2179c59195e