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- NXP SoC lx2160a needs additional ddr_fip.bin.

- There are three types of ddr image that can be created:
  -- ddr_fip.mk for creating fip_ddr.bin image for normal boot.
  -- ddr_fip_sb.mk for creating fip_ddr_sec.bin image for NXP CSF based
     CoT/secure boot.
  -- ddr_fip_tbbr.mk for creating fip_ddr_sec.bin image for MBEDTLS
     CoT/secure boot.
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I24bff8d489f72da99f64cb79b2114faa9423ce8c