Core: Make initial debug config platform-specific

This patch defines a platform abstraction layer for the initial debug
configuration, which needs to be implemented per each platform,
and executed in tfm_core.c, as an extra step in the tfm_core_init
function.

Change-Id: I27bdbe35b47e3124f7176a931f1895bd06187dc4
Signed-off-by: Marc Moreno <marc.morenoberengue@arm.com>
6 files changed