Add MAINTAINERS entry for virtio_console

I'm taking ownership of the virtio_console module; but I'll continue
feeding patches via Rusty.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

MAINTAINERS

@@ -2393,6 +2393,12 @@ L:	linuxppc-dev@ozlabs.org
 S:	Odd Fixes
 F:	drivers/char/hvc_*
 
+VIRTIO CONSOLE DRIVER
+M:	Amit Shah <amit.shah@redhat.com>
+L:	virtualization@lists.linux-foundation.org
+S:	Maintained
+F:	drivers/char/virtio_console.c
+
 GSPCA FINEPIX SUBDRIVER
 M:	Frank Zago <frank@zago.net>
 L:	linux-media@vger.kernel.org