Add a new method to set up the individual port in question.

The AR8327 requires some different setup code.
Teach the PHY register path about the different MDIO bus address
for the AR8327.

Tested:

* AR8327, DB120
Turn the port init function into a HAL method and initialise it to the
default port init code.

This needs to be overridden for the AR8327.
Add methods for the VLAN port set/get routines.

The registers (and perhaps the flags) are different for the AR8327, so
I'll stub those out until they're written.

Tested:

* DB120 - both on-chip AR9340 and AR8327 switches.
Extract out the port VLAN flags/setup code and throw it into two new
HAL methods.

This allows the AR8327 code to override it as appropriate.

Tested:

* DB120 - AR8327 and AR9340 on-board switch; only running 'etherswitchcfg'
  to check configs.  The actual VLAN programming wasn't tested.
Really (I think) fix the sporadic heimdal build failures with high -j
levels. The root of the problem was that make was attempting to run up
to three concurrent asn1_compile commands to produce the three outputs
that it was declared to produce.  The failure was caused when the
asn1_compiles were started out of sync and a later one was truncating
the files that another thread was trying to copy.  In reality it is
supposed to be run exactly once and all three outputs are produced in
one pass.

Use the same hack as for the parent's Makefile.inc for the compile_et
multi-output rule.
V_irtualize rtsock refcounting, which reduces the chances for panics
on teardown of vnets without active routing sockets while at least
one routing socket is active elsewhere.

Tested by:	Vijay Singh
MFC after:	3 days
Update MIPS bootinfo.h to reflect the actual MIPS boot2/loader boot-time
interface.

MFC after:	3 weeks
Sponsored by:	DARPA, AFRL
Add missing Save Cursor support for VT520

Submitted by:	IWAMOTO Kouichi <sue@iwmt.org>
PR:		conf/174937
Obtained from:	http://web.mit.edu/dosathena/doc/www/ek-vt520-rm.pdf
Approved by:	bapt (mentor)
MFC after:	2 weeks
Merge remote-tracking branch 'upstream-github/master' into soldierx/lattera/aslr