MAINTAINERS: Change fsl-qoriq, mpc85xx, mpc86xx maintainers

Change maintainers to Prabhakar Kushwaha for fsl-qoriq, mpc85xx
and mpc86xx.

Signed-off-by: York Sun <york.sun@nxp.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
diff --git a/board/freescale/mpc8572ds/MAINTAINERS b/board/freescale/mpc8572ds/MAINTAINERS
index 46c2903..80a3096 100644
--- a/board/freescale/mpc8572ds/MAINTAINERS
+++ b/board/freescale/mpc8572ds/MAINTAINERS
@@ -1,5 +1,5 @@
 MPC8572DS BOARD
-M:	York Sun <york.sun@nxp.com>
+M:	Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
 S:	Maintained
 F:	board/freescale/mpc8572ds/
 F:	include/configs/MPC8572DS.h