PCI: VMD: Update filename to reflect move

Updating MAINTAINERS to reflect the new location of the VMD driver.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

MAINTAINERS

@@ -9318,7 +9318,7 @@ PCI DRIVER FOR INTEL VOLUME MANAGEMENT DEVICE (VMD)
 M:	Keith Busch <keith.busch@intel.com>
 L:	linux-pci@vger.kernel.org
 S:	Supported
-F:	arch/x86/pci/vmd.c
+F:	drivers/pci/host/vmd.c
 
 PCIE DRIVER FOR ST SPEAR13XX
 M:	Pratyush Anand <pratyush.anand@gmail.com>