Core: Use separate '.inc' file and init function

- Remove the 'tfm_spm_db.inc', use separate files, separate SPM
initialization functions for different models.
- Remove unused inclusion of header file 'spm_db.h'.

Change-Id: I7427eaee691a02c9b25579972902974ac9d32fd7
Signed-off-by: Mingyang Sun <mingyang.sun@arm.com>
18 files changed