qnx4: credit contributors in CREDITS

Replace the content of the qnx4 README file with the canonical place for
such information.

Add the credits of the qnx4 contribution to CREDITS. As there is already a
QNX4 FILESYSTEM section in MAINTAINERS, it is clear who to contact and send
patches to.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-By: Anders Larsen <al@alarsen.net>
Link: https://lore.kernel.org/r/20230220170210.15677-3-lukas.bulwahn@gmail.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>

CREDITS

@@ -890,6 +890,10 @@ W: http://jdelvare.nerim.net/
 D: Several hardware monitoring drivers
 S: France
 
+N: Frank "Jedi/Sector One" Denis
+E: j@pureftpd.org
+D: QNX4 filesystem
+
 N: Peter Denison
 E: peterd@pnd-pc.demon.co.uk
 W: http://www.pnd-pc.demon.co.uk/promise/
@@ -1263,6 +1267,10 @@ S: USA
 N: Adam Fritzler
 E: mid@zigamorph.net
 
+N: Richard "Scuba" A. Frowijn
+E: scuba@wxs.nl
+D: QNX4 filesystem
+
 N: Fernando Fuganti
 E: fuganti@conectiva.com.br
 E: fuganti@netbank.com.br
@@ -2222,6 +2230,10 @@ D: Digiboard PC/Xe and PC/Xi, Digiboard EPCA
 D: NUMA support, Slab allocators, Page migration
 D: Scalability, Time subsystem
 
+N: Anders Larsen
+E: al@alarsen.net
+D: QNX4 filesystem
+
 N: Paul Laufer
 E: paul@laufernet.com
 D: Soundblaster driver fixes, ISAPnP quirk

fs/qnx4/README

-
-  This is a snapshot of the QNX4 filesystem for Linux.
-  Please send diffs and remarks to <al@alarsen.net> .
-  
-Credits :
-
-Richard "Scuba" A. Frowijn     <scuba@wxs.nl>
-Frank "Jedi/Sector One" Denis  <j@pureftpd.org>
-Anders Larsen                  <al@alarsen.net> (Maintainer)