powerpc/c29xpcie: Add secure boot support

Add NOR and SPI flash secure boot target for C29XPCIE board.

Signed-off-by: Po Liu <Po.Liu@freescale.com>
Signed-off-by: Mingkai.Hu <Mingkai.Hu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/configs/C29XPCIE_SPIFLASH_SECBOOT_defconfig b/configs/C29XPCIE_SPIFLASH_SECBOOT_defconfig
new file mode 100644
index 0000000..d1a42b2
--- /dev/null
+++ b/configs/C29XPCIE_SPIFLASH_SECBOOT_defconfig
@@ -0,0 +1,4 @@
+CONFIG_SYS_EXTRA_OPTIONS="C29XPCIE,36BIT,SPIFLASH,SECURE_BOOT"
+CONFIG_PPC=y
+CONFIG_MPC85xx=y
+CONFIG_TARGET_C29XPCIE=y