MAINTAINERS: update KVM entry

Add myself to KVM MAINTAINERS entry.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 8dca9d8..24f2694 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2928,6 +2928,7 @@
 
 KERNEL VIRTUAL MACHINE (KVM)
 M:	Avi Kivity <avi@redhat.com>
+M:	Marcelo Tosatti <mtosatti@redhat.com>
 L:	kvm@vger.kernel.org
 W:	http://kvm.qumranet.com
 S:	Supported