SPM: Extract common debug code used for SPs

In later patches we will want to use the debug code defined in
cactus_debug.c for the Ivy partition, so create a common sp_debug
file for code re-use.

Signed-off-by: Ruari Phipps <ruari.phipps@arm.com>
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>
Change-Id: Ifc9cf0043f3f7549b1668623b44d10cae64ddab0
7 files changed