MAINTAINERS: Make section QOM cover hw/core/*bus.c as well

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200610053247.1583243-59-armbru@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index de25c82..b69edc2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2298,6 +2298,8 @@
 S: Supported
 F: docs/qdev-device-use.txt
 F: hw/core/qdev*
+F: hw/core/bus.c
+F: hw/core/sysbus.c
 F: include/hw/qdev*
 F: include/monitor/qdev.h
 F: include/qom/