AUTHORS: Move src/arch/x86 copyrights into AUTHORS file

As discussed on the mailing list and voted upon, the coreboot project
is going to move the majority of copyrights out of the headers and into
an AUTHORS file.  This will happen a bit at a time, as we'll be unifying
license headers at the same time.

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: Ifd4329905847d9dd06de67b9a443c8ee50c0e7a7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35177
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

AUTHORS

@@ -8,6 +8,8 @@
 # To see a list of contributors: git log --pretty=format:%an | sort | uniq
 # For patches adding or removing a name: git log -i -S "NAME" --source --all
 
+9elements Agency GmbH
+Advanced Micro Devices, Inc
 Alex Züpke
 Alexander Couzens
 Alexandru Gagniuc
@@ -20,18 +22,26 @@ Free Software Foundation, Inc.
 Gary Jennejohn
 Google LLC
 Imagination Technologies
+Intel Corporation
 Kshitij
+Libra Li
 Marius Gröger
 MontaVista Software, Inc.
 Nick Barker
+Patrick Georgi
+Patrick Rudolph
 Per Odlund
 Raptor Engineering, LLC.
 Richard Woodruff
 Ronald G. Minnich
+Rudolf Marek
 Russell King
+Sage Electronic Engineering, LLC
 Siemens AG
+Stefan Reinauer
 Steve Magnani
 SUSE LINUX AG
+Sven Schnelle
 Syed Mohammed Khasim
 Texas Instruments
 The Linux Foundation
@@ -46,4 +56,4 @@ src/arch/arm
 src/arch/arm64
 src/arch/mips
 src/arch/ppc64
-
+src/arch/x86