Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Add "%option noinput" to aicasm_scan.l and aicasm_macro_scan.l, so no
unneeded input functions will be emitted.

Spotted by: arundel
MFC after: 1 week

Improve portability #defines for compiling aicasm on other systems.

Submitted by: Robert Millan rmh debian.org
Obtained from: Debian GNU/kFreeBSD

Revert r213765. This is required because our build infrastructure uses
the host lex instead of the lex built during buildworld. I will MFC the
lex changes soon and in a few weeks this I'll commit again r213765.

Define YY_NO_INPUT. This makes aicasm buildable by clang with Werror
turned on.

Add missing `void' keywords.

Code cleanups to make this WARNS=6 clean.

PR: bin/96128

Start each of the license/copyright comments with /*-, minor shuffle of lines

Modify assembler to ignore carriage returns in input.
This should make those using the assembler under cygwin
happy.

Remove redundant inclusion of inttypes.h in aicasm_gram.y
and properly sort inttypes.h into list of includes.

Noticed by: Mike Barcroft <mike@freebsd.org>

Use inttypes.h

Upgrade assembler to allow a move immediate of 0.
This is helpful in certain macros where we can't know the value of the
immediate in advance.

Update assembler syntax and assembler to allow generation of register
description tables used for diagnostic "pretty printing".

Add macro functionality.

Staticize and allow unique naming of data structures so that more
than on sequencer program can be statically compiled into the kernel
at a time.