MAINTAINERS: add Halil as additional vfio-ccw maintainer

Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Acked-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

MAINTAINERS

@@ -11863,6 +11863,7 @@ F:	drivers/pci/hotplug/s390_pci_hpc.c
 S390 VFIO-CCW DRIVER
 M:	Cornelia Huck <cohuck@redhat.com>
 M:	Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
+M:	Halil Pasic <pasic@linux.vnet.ibm.com>
 L:	linux-s390@vger.kernel.org
 L:	kvm@vger.kernel.org
 S:	Supported