treewide: move copyrights and authors to AUTHORS

Also split "this is part of" line from copyright notices.

Change-Id: Ibc2446410bcb3104ead458b40a9ce7819c61a8eb
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41067
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

AUTHORS

@@ -43,6 +43,7 @@ Code Aurora Forum
 coresystems GmbH
 Corey Osgood
 Curt Brune
+Custom Ideas
 Damien Zammit
 Dave Airlie
 David Brownell
@@ -56,6 +57,7 @@ DENX Software Engineering
 Derek Waldner
 Digital Design Corporation
 DMP Electronics Inc.
+Donghwa Lee
 Drew Eckhardt
 Dynon Avionics
 Edward O'Callaghan
@@ -76,6 +78,7 @@ Free Software Foundation, Inc.
 Freescale Semiconductor, Inc.
 Gary Jennejohn
 George Trudeau
+Gerald Van Baren
 Gerd Hoffmann
 Gergely Kiss
 Google LLC
@@ -91,6 +94,7 @@ Idwer Vollering
 Igor Pavlov
 Imagination Technologies
 Infineon Technologies
+InKi Dae
 Intel Corporation
 Iru Cai
 Isaku Yamahata
@@ -135,6 +139,7 @@ Marvell Semiconductor Inc.
 Matt DeVillier
 Maxim Polyakov
 MediaTek Inc.
+Michael Brunner
 Michael Schroeder
 Michael Niewöhner
 Mika Westerberg
@@ -163,6 +168,7 @@ Paulo Alcantara
 Pavel Sayekat
 PC Engines GmbH
 Per Odlund
+Peter Korsgaard
 Peter Stuge
 Philipp Degler
 Philipp Deppenwiese