Add port routing support for Wildcat Point.

PR:		195793
MFC after:	1 week
Pull in r223171 from upstream llvm trunk (by Michael Zolotukhin):

  PR21302. Vectorize only bottom-tested loops.

  rdar://problem/18886083

This fixes a bug in the llvm vectorizer, which could sometimes cause
vectorized loops to perform an additional iteration, leading to possible
buffer overruns.  Symptoms of this, which are usually segfaults, were
first noticed when building gcc ports, here:

https://lists.freebsd.org/pipermail/freebsd-ports/2014-September/095466.html
https://lists.freebsd.org/pipermail/freebsd-toolchain/2014-September/001211.html

Since this fix is very important for ports, bump __FreeBSD_version to
make it easier for port maintainers to test whether the fix has been
applied.

Upstream PR:	http://llvm.org/PR21302
MFC after:	3 days
Move OFED init a bit earlier so that PXE boot works.

MFC after:	3 days
Sponsored by:	Mellanox Technologies
Apply chunk forgotten in r275620.  Remove local variable for real.

CID:	1257462
Sponsored by:	The FreeBSD Foundation
Do not call VFS_SYNC() before VFS_UNMOUNT() for forced unmount.

Since VFS does not/cannot stop writes, sync might run indefinitely, or
be a wrong thing to do at all.  E. g. NFS ignores VFS_SYNC() for
forced unmounts, since non-responding server does not allow sync to
finish.  On the other hand, filesystems can and do stop writes using
fs-specific facilities, and should already fully flush caches in
VFS_UNMOUNT() due to the race.

Adjust msdosfs tp sync in unmount for forced call, to accomodate the
new behaviour.  Note that it is still racy, since writes are not
stopped.

Discussed with:	avg, bjk, mckusick
Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	3 weeks
Include sys/kernel.h to pick up the definition of hz. subr_syscall.c uses
it after r275616.

X-MFC with:	r275616
Update the virtio driver to work on the ARM AArch64 Foundation Model.
There are two main parts to get it to work, 1) most of the register
accesses need to be word sized, other than the config register which
needs to be byte aligned, and 2) we don't need the platform driver
for this to work on the Foundation Model, allow it to be NULL.

Differential Revision:	https://reviews.freebsd.org/D1240
Reviewed by:	bryanv
Sponsored by:	The FreeBSD Foundation
xen: notify ACPI about SCI override

If the SCI is remapped to a non-ISA global interrupt notify the ACPI
subsystem about the override.

Reported by: David P. Discher <dpd@dpdtech.com>
Sponsored by: Citrix Systems R&D
Skip calling CPU_ISSET for NOCPU as a short period of time we can have
td_oncpu is NOCPU for thread in TDS_RUNNING state.

Differential Revision:	https://reviews.freebsd.org/D1283
Reviewed by:	jhb
MFC after:	1 Month
ext2fs: Fix old out-of-bounds access.

Overrunning buffer pointed to by (caddr_t)&oip->i_db[0] of 48 bytes by
passing it to a function which accesses it at byte offset 59 using
argument 60UL.

The issue was inherited from an older FFS implementation and
fixed there with by merging UFS2 in r98542. We follow the
FFS fix.

Discussed with:	bde
CID:		1007665
MFC after:	3 days
Rename NETGEAR WG111V2_2 to WG111V1_2 to reflect external naming.

Reviewed by:	kevlo
o Add BERI Virtio Networking Frontend (if_vtbe)
o Move similar block/networking methods to common file
o Follow r275640 and correct MMIO registers width
o Pass value to MMIO platform_note method.

Sponsored by:	DARPA, AFRL
xen: create a new PCI bus override

When running as a Xen PVH Dom0 we need to add custom buses that override
some of the functionality present in the ACPI PCI Bus and the PCI Bus. We
currently override the ACPI PCI Bus, but not the PCI Bus, so add a new
override for the PCI Bus and share the generic functions between them.

Reported by: David P. Discher <dpd@dpdtech.com>
Sponsored by: Citrix Systems R&D

conf/files.amd64:
 - Add the new files.

x86/xen/xen_pci_bus.c:
 - Generic file that contains the PCI overrides so they can be used by the
   several PCI specific buses.

xen/xen_pci.h:
 - Prototypes for the generic overried functions.

dev/xen/pci/xen_pci.c:
 - Xen specific override for the PCI bus.

dev/xen/pci/xen_acpi_pci.c:
 - Xen specific override for the ACPI PCI bus.
-u and -U are supposed to affect existing files too.

Reviewed by:	marcel
Add llvm patch corresponding to r275633.
Add more tests for pw(8) useradd.

PR:		195832
Submitted by:	Robert O'Neil <oneil.rs@gmail.com>
Approved by:	will
Break out the tests into a file per command and clean up some long lines

Approved by:	will
Add some tests for user modification. [1]
Fix a missing test in the Makefile from my previous commit.

PR:		195834 [1]
Submitted by:	Robert O'Neil <oneil.rs@gmail.com>
Approved by:	will
Restructure to make it easier to extend in the future

Reviewed by:	will
Suggested by:	ngie
Fix dependency on newvers.sh

Noticed by:	marck
MFC after:	1 week