sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

_ARM_ARCH_5E is always defined, we not support older CPUs.

Remove remaining support of big endian byte order.
Big endian support was ceased by removing ARMv4 sub architecture.

Rename assym.s to assym.inc

assym is only to be included by other .s files, and should never
actually be assembled by itself.

Reviewed by: imp, bdrewery (earlier)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D14180

Switch to unified syntax so these can be built with clang 3.5.

MFC after: 1 week
Sponsored by: ABT Systems Ltd

Add an END macro to ARM. This is mostly used to tell gas where the bounds
of the functions are when creating the EABI unwind tables.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

- Import the HEAD csup code which is the basis for the cvsmode work.

Do not use __XSCALE__ to detect if pld/strd/ldrd is available, use
_ARM_ARCH_5E instead.

MFC After: 3 days

Only save the registers that are used.

Use asm versions of in_cksum() and friends.

Start all license statements with /*-

Use the RET macro.

Remove filename+line number from panic messages.

Import FreeBSD/arm kernel bits.
It only supports sa1110 (on simics) right now, but xscale support should come
soon.
Some of the initial work has been provided by :
Stephane Potvin <sepotvin at videotron.ca>
Most of this comes from NetBSD.