Include missing header in arm_bl2_setup.c
Include missing header in arm_bl2_setup.c

Change-Id: I4108ce8d1fe7d3fd51a5a96d43b9134c23b8399b
Signed-off-by: dp-arm <5172875e934a989df22d22726b6d9d921b91fbdd@arm.com>

lsigithub/arm-trusted-firmware_public,achingupta/arm-trusted-firmware,lsigithub/arm-trusted-firmware_public,achingupta/arm-trusted-firmware