juno/ramfw: Add debug support

Adds  configuration for enabling full support to debug
Juno.

Change-Id: Iad83db8e85821f51c8b7d10724ed45a872259e13
Signed-off-by: Nicola Mazzucato <nicola.mazzucato@arm.com>
Signed-off-by: Raphael Gault <raphael.gault@arm.com>
Signed-off-by: Girish Pathak <girish.pathak@arm.com>