css: Do not map the non-secure RAM as secure
css: Do not map the non-secure RAM as secure

Change-Id: I7e73c0ab134da11c49f990b739245110c59eac2b
Signed-off-by: Chris Kay <9c0c41cd71461f9de7536bb7a214db3cff1e29f1@arm.com>

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