psa: Include region_defs.h where needed

We are moving to flash_layout.h and region_defs.h being more closely
aligned with TF-M's version. As such, some of the Mbed PSA
implementation needs to additionally include region_defs.h.

components/TARGET_PSA/services/attestation/COMPONENT_PSA_SRV_IMPL/attest_boot_status_loader.c

@@ -21,6 +21,9 @@
 #include "attestation.h"
 #include "attestation_bootloader_data.h"
 #include "tfm_impl/tfm_boot_status.h"
+#ifdef TARGET_TFM
+#include "region_defs.h"
+#endif
 
 /*!
  * \def SHARED_DATA_INITIALZED and SHARED_DATA_UNNITIALZED