mx6sxsabreauto: Remove myself from MAINTAINERS

I don't have access to the mx6sxsabreauto board, so remove myself
from the MAINTAINERS entry and add Peng instead.

Signed-off-by: Fabio Estevam <festevam@denx.de>
Acked-by: Peng Fan <peng.fan@nxp.com>
diff --git a/board/freescale/mx6sxsabreauto/MAINTAINERS b/board/freescale/mx6sxsabreauto/MAINTAINERS
index 692bbd9..8dc62e5 100644
--- a/board/freescale/mx6sxsabreauto/MAINTAINERS
+++ b/board/freescale/mx6sxsabreauto/MAINTAINERS
@@ -1,5 +1,5 @@
 MX6SXSABREAUTO BOARD
-M:	Fabio Estevam <festevam@gmail.com>
+M:	Peng Fan <peng.fan@nxp.com>
 S:	Maintained
 F:	board/freescale/mx6sxsabreauto/
 F:	include/configs/mx6sxsabreauto.h