Boot: Move logging macros to project specific file

Move the logging macros to mcuboot_logging.h and add another project
specific mcuboot_config.h file as they are needed to build TF-M with
upstream MCUBoot.

Change-Id: I01d0c6aed028f8e9c6db6acfd290e12afd3dfdc1
Signed-off-by: David Vincze <david.vincze@arm.com>
5 files changed