powerpc/qoriq: Move FMAN microcode location

Move FMAN microcude from 0xEF000000 to 0xEFF40000 to free up the beginning
of this virtual bank so that this bank can store RCW or be used together
with other banks to store large images.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>