Remove #if NFOO > 0 (it's not required in most cases) and also where it
isn't used as a result, remove #include "foo.h".  Many of these drivers
still use NFOO for softc struct sizing etc however.
Fix this so LINT compiles.  There is no way this could have worked if
tested with LINT.  I've put back netatm/kern_include.h and maked it
with a fixme!, otherwise NETISR_ATM isn't defined as ATM_KERNEL isn't
defined.  Defining that exposes a whole bunch of other dependencies.. :-(
Remove a bunch of unused (NO-OP) #if NFOO > 0 type includes and some
#include "foo.h" headers.
Remove a warning from LINT
Remove sys/tablet.h and kern/tty_tb.c (the old RS232 CAD-style tablet
support code).  It hasn't worked since at least October 1995, and probably
has never worked in the FreeBSD 2.0+ tree.  Obviously it's not a priority
to many folks.

Reviewed by:	phk, sos
Remove kern/tty_tb.c.
Remove (commented out and marked as broken) pseudo-device tb.  This was
added in rev 1.205 (october 1995).
Clean up some compilation warnings and errors.
Put tslb_device structure in this file. Put a pointer to to primary
CPU's structure.
Update copyright and pull some newer definitions from NetBSD version.
Don't report the tablet line discipline, it "doesn't happen (TM)"
Don't report TABLDISC - it "doesn't happen(TM)"
Remove the TABLDISC line discipline number, it's not in the tree
any more (and never worked in FreeBSD 2.x onwards as far as I can tell),
and isn't used by anything in the tree any more either.
Remove some #if NFOO > 0 that are always true because of config rules.
Wrong patch had been applied.
Remove #include "wd.h" and #if NWDC > 0 as that's always true as this
file is 'optional wdc'  (note wd.h has both NWDC and NWD in it because
of config quirks)
Move the (duplicated exactly!) portable ISA pcm drivers to files and
tighten up the logic a little.
update copyright
Force installs. This is to allow (semi-)automatic garbage removal by
"find /usr/libdata -ctime -N -delete".
Allow the pnp and pci cards to be attached with just a 'device pcm' in
the user's config file.  Based on an idea/suggestion from Cameron (cg).

Change LINT to build newpcm instead of the old Voxware derived stuff.
That's much more useful in the longer term.