board/freescale: Update MAINTAINERS files

Update maintainers for secure boot targets.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/t4qds/MAINTAINERS b/board/freescale/t4qds/MAINTAINERS
index b159113..b288571 100644
--- a/board/freescale/t4qds/MAINTAINERS
+++ b/board/freescale/t4qds/MAINTAINERS
@@ -12,7 +12,7 @@
 F:	configs/T4240QDS_SRIO_PCIE_BOOT_defconfig
 
 T4160QDS_SECURE_BOOT BOARD
-M:	Aneesh Bansal <aneesh.bansal@freescale.com>
+M:	Ruchika Gupta <ruchika.gupta@nxp.com>
 S:	Maintained
 F:	configs/T4160QDS_SECURE_BOOT_defconfig
 F:	configs/T4240QDS_SECURE_BOOT_defconfig