[DCCP]: Add MAINTAINERS and CREDITS entries

Also remove the SPX entry in MAINTAINERS, forgot to do that
when I removed it.

Signed-off-by: Ian McDonald <iam4@cs.waikato.ac.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/MAINTAINERS b/MAINTAINERS
index d1e0eb4..dc8f3ba 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -686,6 +686,13 @@
 M:	g.liakhovetski@gmx.de
 S:	Maintained
 
+DCCP PROTOCOL
+P:	Arnaldo Carvalho de Melo
+M:	acme@mandriva.com
+L:	dccp@vger.kernel.org
+W:	http://www.wlug.org.nz/DCCP
+S:	Maintained
+
 DECnet NETWORK LAYER
 P:	Patrick Caulfield
 M:	patrick@tykepenguin.com
@@ -2271,12 +2278,6 @@
 L:	linux-kernel@vger.kernel.org ?
 S:	Supported
 
-SPX NETWORK LAYER
-P:	Jay Schulist
-M:	jschlst@samba.org
-L:	netdev@vger.kernel.org
-S:	Supported
-
 SRM (Alpha) environment access
 P:	Jan-Benedict Glaw
 M:	jbglaw@lug-owl.de