[SCSI] zfcp: Update MAINTAINERS entry

Martin no longer works on zfcp, remove his entry from the MAINTAINERS
file and add Swen as co-maintainer.

Also remove the reference to the zfcpdump.txt file, zfcpdump is not
part of the zfcp device driver.
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Acked-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

MAINTAINERS

@@ -4781,12 +4781,11 @@ F:	drivers/s390/crypto/
 
 S390 ZFCP DRIVER
 M:	Christof Schmitt <christof.schmitt@de.ibm.com>
-M:	Martin Peschke <mp3@de.ibm.com>
+M:	Swen Schillig <swen@vnet.ibm.com>
 M:	linux390@de.ibm.com
 L:	linux-s390@vger.kernel.org
 W:	http://www.ibm.com/developerworks/linux/linux390/
 S:	Supported
-F:	Documentation/s390/zfcpdump.txt
 F:	drivers/s390/scsi/zfcp_*
 
 S390 IUCV NETWORK LAYER