LS1012AFRWY: Add Secure Boot support

Added the following:
1. defconfig for LS1012AFRWY Secure boot
2. PfE Validation support

Signed-off-by: Vinitha V Pillai <vinitha.pillai@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/ls1012afrdm/MAINTAINERS b/board/freescale/ls1012afrdm/MAINTAINERS
index 36e3e5a..f3fcdb8 100644
--- a/board/freescale/ls1012afrdm/MAINTAINERS
+++ b/board/freescale/ls1012afrdm/MAINTAINERS
@@ -11,3 +11,7 @@
 F:      board/freescale/ls1012afrwy/
 F:      include/configs/ls1012afrwy.h
 F:      configs/ls1012afrwy_qspi_defconfig
+
+M:	Vinitha V Pillai <vinitha.pillai@nxp.com>
+S:	Maintained
+F:	configs/ls1012afrwy_qspi_SECURE_BOOT_defconfig