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/MAINTAINERS b/MAINTAINERS
index e3a1586..bec019d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -497,7 +497,7 @@
 T:	git git://git.denx.de/u-boot-freebsd.git
 
 FREESCALE QORIQ
-M:	York Sun <york.sun@nxp.com>
+M:	Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
 S:	Maintained
 T:	git git://git.denx.de/u-boot-fsl-qoriq.git
 
@@ -646,13 +646,13 @@
 F:	arch/powerpc/include/asm/arch-mpc83xx/
 
 POWERPC MPC85XX
-M:	York Sun <york.sun@nxp.com>
+M:	Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
 S:	Maintained
 T:	git git://git.denx.de/u-boot-mpc85xx.git
 F:	arch/powerpc/cpu/mpc85xx/
 
 POWERPC MPC86XX
-M:	York Sun <york.sun@nxp.com>
+M:	Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
 S:	Maintained
 T:	git git://git.denx.de/u-boot-mpc86xx.git
 F:	arch/powerpc/cpu/mpc86xx/