version 1.00

input  -> psi_ram.fls
          psi_flash.fls
          slb.fls
          ebl_signed.fls (Get from BSP)

output -> psi_ram_signed.fls
          psi_flash_signed_bl.fls
          slb_signed_bl.fls

(Note: default PSI_FORMAT is PKCS. If user want to sign with legacy PSI format,
       add 'PSI_FORMAT=Legacy' in the make command.
       eg. make $> Sign_psi_ram PSI_FORMAT=Legacy)
