MAINTAINERS: Add VM Generation ID entries

Signed-off-by: NBen Warren <ben@skyportsystems.com>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>

MAINTAINERS

@@ -1124,6 +1124,15 @@ F: hw/nvram/chrp_nvram.c
 F: include/hw/nvram/chrp_nvram.h
 F: tests/prom-env-test.c
 
+VM Generation ID
+M: Ben Warren <ben@skyportsystems.com>
+S: Maintained
+F: hw/acpi/vmgenid.c
+F: include/hw/acpi/vmgenid.h
+F: docs/specs/vmgenid.txt
+F: tests/vmgenid-test.c
+F: stubs/vmgenid.c
+
 Subsystems
 ----------
 Audio