imx: boards: Add maintainers info

Add MAINTAINERS info for mx6slevk_spl, mx6ul_9x9_evk and mx6qpsabreauto.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/board/freescale/mx6qsabreauto/MAINTAINERS b/board/freescale/mx6qsabreauto/MAINTAINERS
index fb65ce4..75a8862 100644
--- a/board/freescale/mx6qsabreauto/MAINTAINERS
+++ b/board/freescale/mx6qsabreauto/MAINTAINERS
@@ -1,7 +1,9 @@
 MX6QSABREAUTO BOARD
 M:	Fabio Estevam <fabio.estevam@freescale.com>
+M:	Peng Fan <Peng.Fan@freescale.com>
 S:	Maintained
 F:	board/freescale/mx6qsabreauto/
 F:	include/configs/mx6qsabreauto.h
 F:	configs/mx6dlsabreauto_defconfig
 F:	configs/mx6qsabreauto_defconfig
+F:	configs/mx6qpsabreauto_defconfig