armv8: ls1012ardb: Add TFABOOT support

TFABOOT support includes:
 - ls1012ardb_tfa_defconfig to be loaded by trusted firmware
 - environment address and size changes for TFABOOT
 - define BOOTCOMMAND for TFABOOT
 - enable PFE validation for secure boot

Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Signed-off-by: Vinitha V Pillai <vinitha.pillai@nxp.com>
Signed-off-by: Pankit Garg <pankit.garg@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/ls1012ardb/Kconfig b/board/freescale/ls1012ardb/Kconfig
index 4cd66bd..51efd0f 100644
--- a/board/freescale/ls1012ardb/Kconfig
+++ b/board/freescale/ls1012ardb/Kconfig
@@ -33,6 +33,10 @@
 	hex "Flash address of PFE firmware"
 	default 0x40a00000
 
+config SYS_LS_PFE_ESBC_ADDR
+	hex "PFE Firmware HDR Addr"
+	default 0x40700000
+
 config DDR_PFE_PHYS_BASEADDR
 	hex "PFE DDR physical base address"
 	default 0x03800000