Core: Remove tfm_spm_signal_defs.h

Remove 'tfm_spm_signal_defs.h' which used to include the service signal
value for SPM and add the generate manifest header file to the related
file directly.

Change-Id: I49e32e3053b6e73571db5b1f07149ab2a9087d22
Signed-off-by: Edison Ai <edison.ai@arm.com>
6 files changed