MAINTAINERS: add entry for cubieboard7 config

This commit adds entry for cubieboard7 config under Actions Semi
OWL family.

Signed-off-by: Amit Singh Tomar <amittomer25@gmail.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 4504afc..dd92af5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -276,6 +276,7 @@
 F:	drivers/serial/serial_owl.c
 F:	include/configs/owl-common.h
 F:	configs/bubblegum_96_defconfig
+F:	configs/cubieboard7_defconfig
 
 ARM RENESAS RMOBILE/R-CAR
 M:	Nobuhiro Iwamatsu <iwamatsu@nigauri.org>