Introduce config header files to set TF-M specific configs

This patch introduces config header files to set TF-M specific configs.
-config_base.h: Default TF-M project config file.
-config_profile_*.h: TF-M project config files for different Profiles.
-config_tfm_target.h: Header files provided by platform owners to
 customize TF-M configs for their platforms.
-config_<partition>.h: Header files to set default configs for each partition
 in case there is any config not set in TF-M project config file.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I2180c5bd8d1f155cc047f158cfdbcddde8d3240e
13 files changed