Core: Move tfm_utils from ipc to core

Move tfm_utils source and header to the core folder, so that the
utilities can be used from library model as well.

Change-Id: I17f70e4e7f377c76c583571fac6aa12c9bb4afd0
Signed-off-by: Mate Toth-Pal <mate.toth-pal@arm.com>
4 files changed