MAINTAINERS: Add myself to S390 ZFCP DRIVER as a co-maintainer

I have been working with Steffen on zFCP for quite a while now and we
decided adding me as a co-maintainer might be a good thing.
Acked-by: Steffen Maier <maier@linux.vnet.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

MAINTAINERS

@@ -11442,6 +11442,7 @@ F:	drivers/s390/crypto/
 
 S390 ZFCP DRIVER
 M:	Steffen Maier <maier@linux.vnet.ibm.com>
+M:	Benjamin Block <bblock@linux.vnet.ibm.com>
 L:	linux-s390@vger.kernel.org
 W:	http://www.ibm.com/developerworks/linux/linux390/
 S:	Supported