MAINTAINERS: Orphan vfio fsl-mc bus driver

Email to Diana is bouncing.  I've reached out through other channels
but not been successful for a couple months.  Lore shows no email from
Diana for approximately 18 months.  Mark this driver as orphaned.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20240401170224.3700774-1-alex.williamson@redhat.comSigned-off-by: Alex Williamson <alex.williamson@redhat.com>

MAINTAINERS

@@ -23225,9 +23225,8 @@ F:	include/linux/vfio_pci_core.h
 F:	include/uapi/linux/vfio.h
 
 VFIO FSL-MC DRIVER
-M:	Diana Craciun <diana.craciun@oss.nxp.com>
 L:	kvm@vger.kernel.org
-S:	Maintained
+S:	Orphan
 F:	drivers/vfio/fsl-mc/
 
 VFIO HISILICON PCI DRIVER