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>
4 files changed