powerpc: mpc86xx: Update maintainer for MPC8610HPCD and MPC8641HPCN

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/mpc8641hpcn/MAINTAINERS b/board/freescale/mpc8641hpcn/MAINTAINERS
index 9790247..86dcf6b 100644
--- a/board/freescale/mpc8641hpcn/MAINTAINERS
+++ b/board/freescale/mpc8641hpcn/MAINTAINERS
@@ -1,6 +1,6 @@
 MPC8641HPCN BOARD
-#M:	Kumar Gala <kumar.gala@freescale.com>
-S:	Orphan (since 2014-06)
+M:	York Sun <york.sun@nxp.com>
+S:	Maintained
 F:	board/freescale/mpc8641hpcn/
 F:	include/configs/MPC8641HPCN.h
 F:	configs/MPC8641HPCN_defconfig