o LLC: split llc into llc_core and llc2 modules

o LLC: split llc into llc_core and llc2 modules

For this some more functions had to be moved around, now one doesn't
have to explicitely select LLC to have access in the menu to ipx,
appletalk, token ring, etc.

This is not yet as good as I want it to be, but at least makes it
easier for the hordes of users to select stuff, making it look more
like how it was in 2.4.

In the next changesets I'll fix the fact that CONFIG_TR is a bool
and makes psnap, p8022 and llc_core to be built statically even tho
the token ring drivers are being build as modules.