MAINTAINERS: Add myself as a reviewer for Device Fuzzing

Should have done this much sooner given the amount of reviewing I'm
already doing in this area.

Signed-off-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
diff --git a/MAINTAINERS b/MAINTAINERS
index dffcb65..8b72509 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2711,6 +2711,7 @@
 R: Bandan Das <bsd@redhat.com>
 R: Stefan Hajnoczi <stefanha@redhat.com>
 R: Thomas Huth <thuth@redhat.com>
+R: Darren Kenny <darren.kenny@oracle.com> 
 S: Maintained
 F: tests/qtest/fuzz/
 F: tests/qtest/fuzz-*test.c