Remove only-works-on-amd64 restriction.

Sponsored by:	The FreeBSD Foundation
Add ZEDBOARD.

Tested against:	stable/10@r262905 (build only)
Sponsored by:	The FreeBSD Foundation
- Merge SoC-common parts
- Enable iicbus device
Directly call kmem_alloc_contig to allocate framebuffer memory
and pass VM_MEMATTR_UNCACHEABLE (no-cache, no-buffer).
This fixes screen refreshing problem when data is updated too slowly.

Discussed with:	ian
Add lowercase postfix, so SoC-common file will be ignored by tinderbox.
Add support for keyboard used in Samsung Chromebook (ARM machine)

Support covers device drivers for:
- Interrupt Combiner
- gpio/pad, External Interrupts Controller (pad)
- I2C Interface
- Chrome Embedded Controller
- Chrome Keyboard

Also:
- Use new gpio dev class in EHCI driver
- Expand device tree information
Give hint on how to disable the default repository.

Discussed with:	bapt
MFC after:	instantly (preparing EN)
add capsicum to units(1)
Convert an unused banner from skeleton.c into a comment.
It is added to every generated files and fix build at certain warning level with clang 3.4

Submitted by:	Thomas Dickey <dickey@his.com> (byacc upstream)
Spotted by:	glebius
When building g++, we need to build libsupc earlier to avoid a race
with libproc. Not sure why people didn't see this before now, but I
get it often for higher (20-30) -j builds, but never for -j1 builds.
Allow the build system to safely set MK_FOO to avoid the ambiguity
when both WITH_FOO and WITHOUT_FOO are set. Use this where
possible. Only disallow setting of MK_FOO on the command line. This
was preferable to inventing a new mechanism or fixing the undef bug
(bin/183762) which precludes users from turning off anything we turn
off for parts of the build with WITHOUT_FOO prior to this.
Kill NO_TESTS and use MK_TESTS=no when we want to skip them.
Move stray targets out of the xdev section.
There's no need to guess at the COMPILER_TYPE to pass it down. We
guess wrong for buildkernel when CC=gcc49, say. Eliminate all the
guessing. COMPILER_TYPE propigates properly on its own, if specified,
and we guess it correctly otherwise lower in the build. Also, fix
conditionals for armv6hf when using an external compiler chain. They
were broken before, but unused. Also, prefer checking the compiler
type over CLANG_IS_CC since the latter is only supposed to be used to
determine what symlinks to install (more fixes to follow).
Remove instances of variables that were set, but never used. gcc 4.9
warns about these by default.
Increase the number of TX DMA segments from 32 to 35.  It turned
out 32 is not enough to support a full sized TSO packet.
While I'm here fix a long standing bug introduced in r169632 in
bce(4) where it didn't include L2 header length of TSO packet in
the maximum DMA segment size calculation.

In collaboration with:	rmacklem
MFC after:		2 weeks
Don't copy the MF flag from original IP header to ICMP error message.

PR:		188092
MFC after:	1 week
Sponsored by:	Yandex LLC
Document r263140, removal of IPX.

Sponsored by:	The FreeBSD Foundation
Merge r246607 by benno from projects/uefi

  Use EFI types for EFI values (silences warnings).

EFI UINTN is actually a 64-bit type on 64-bit processors.

Sponsored by:	The FreeBSD Foundation
Don't generate an ICMPv6 error message if packet was consumed by filter.

MFC after:	1 week
Sponsored by:	Yandex LLC