MAINTAINERS: add virtio-iommu related files

Add a new "virtio-iommu" section with the new files
related to this device.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20200214132745.23392-11-eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 195dd58..ff06934 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1631,6 +1631,12 @@
 F: include/hw/virtio/virtio-input.h
 F: contrib/vhost-user-input/*
 
+virtio-iommu
+M: Eric Auger <eric.auger@redhat.com>
+S: Maintained
+F: hw/virtio/virtio-iommu*.c
+F: include/hw/virtio/virtio-iommu.h
+
 virtio-serial
 M: Laurent Vivier <lvivier@redhat.com>
 R: Amit Shah <amit@kernel.org>