Revert r271735. The comment is absolutely correct, we do not support 802.1p priority tagging. I got confused with the packet tagged and packet to be tagged.

Spotted by:	glebius
Implement most of timer_{create,settime,gettime,getoverrun,delete}
for amd64/linux32.  Fix the entirely bogus (untested) version from
r161310 for i386/linux using the same shared code in compat/linux.

It is unclear to me if we could support more clock mappings but
the current set allows me to successfully run commercial
32bit linux software under linuxolator on amd64.

Reviewed by:		jhb
Differential Revision:	D784
MFC after:		3 days
Sponsored by:		DARPA, AFRL
Re-gen after r271743 implementing most of
timer_{create,settime,gettime,getoverrun,delete}.

MFC after:		3 days
Sponsored by:		DARPA, AFRL
For consistency with the shared header file (and to avoid confusion
with mbufs normally called *m in one place), rename the function
arguments to "mem".

This is a non-functional change.

Reviewed by:	gnn, eric.joyner intel.com
MFC after:	3 days
- Use NULL instead of 0 for fpcurthread.
- Note the quirk with the interrupt enabled state of the dna handler.
- Use just panic() instead of printf() and panic().  Print tid instead
  of pid, the fpu state is per-thread.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Add if_inc_counter(), a generic method to update ifnet(9) counter
w/o dereferencing the struct.

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.