plat: marvell: armada: configure amb for all CPs
plat: marvell: armada: configure amb for all CPs

Before this patch the configuration took place only for CP0 and CP1, but
since new platforms can contains up to 3 CPs update is required.

Change-Id: Iebd50bbe7b9772063e2c4efb3a7ecbfd593e950d
Signed-off-by: Grzegorz Jaszczyk <eca1ee760d6aeff8f14b7faabd6238ae79510d1f@semihalf.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware