Oookay - I really got upset by that tmeplates in headers crap when
grepping for certain methods.  The patch below moves all templates
from the headers into the actual implementation files and removes
the ifdef mess for unmaintained drivers - for maintained support
gazillion kernel releases drivers like gdth I've kept them.

This means a driver works fine without any problems for all modular
builds and builtin kernel >= 2.4.0.  If you want certain drivers
to work with 2.0/2.2 statyic builds too I can hack something up for
you, but I'd prefer not supporting stuff like that anymore.

Tested by compiling all drivers with make -k and not getting more
warnings than before :)