MAINTAINERS: add responsible person for Parallels format driver

Denis has spent 6 years working with this format in Parallels and QEMU
code was rewritten almost completely by his. Thus it would be quite
natural to add him as a maintainer and point of contact.

Patches are going to flow though Stefan's tree.
Signed-off-by: NDenis V. Lunev <den@openvz.org>
Message-id: 1440179056-12934-1-git-send-email-den@openvz.org
CC: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

MAINTAINERS

@@ -1307,6 +1307,7 @@ F: block/dmg.c
 
 parallels
 M: Stefan Hajnoczi <stefanha@redhat.com>
+M: Denis V. Lunev <den@openvz.org>
 L: qemu-block@nongnu.org
 S: Supported
 F: block/parallels.c