MAINTAINERS: update for maintainer of s390/zcrypt

Updated the maintainer line for s390/zcrypt.
Ingo Tuchscherer -> Harald Freudenberger.
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

MAINTAINERS

@@ -10393,7 +10393,7 @@ F:	arch/s390/pci/
 F:	drivers/pci/hotplug/s390_pci_hpc.c
 
 S390 ZCRYPT DRIVER
-M:	Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com>
+M:	Harald Freudenberger <freude@de.ibm.com>
 L:	linux-s390@vger.kernel.org
 W:	http://www.ibm.com/developerworks/linux/linux390/
 S:	Supported