powerpc/mpc85xx: Add IFC LAW target ID for FSL High-End SoC

powerpc/mpc85xx: Add IFC LAW target ID for FSL High-End SoC

Freescale's High-End SoC are going to have Integrated Flash controller
(IFC)'s support.

So add IFC LAW target ID support for High-End SoC or corenet SoC.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>