Interface: Rename PSA headers

Renames PSA headers from psa_<api>.h to psa/<api>.h.

Change-Id: I3fc552c39f9a7e6d54e7a7a2f82f076bd03d30a7
Signed-off-by: Jamie Fox <jamie.fox@arm.com>
diff --git a/secure_fw/services/initial_attestation/tfm_attestation.c b/secure_fw/services/initial_attestation/tfm_attestation.c
index f4b1acd..1b8757a 100644
--- a/secure_fw/services/initial_attestation/tfm_attestation.c
+++ b/secure_fw/services/initial_attestation/tfm_attestation.c
@@ -8,7 +8,7 @@
 #include "tfm_api.h"
 #include "tfm_secure_api.h"
 #include "attestation.h"
-#include "psa_initial_attestation_api.h"
+#include "psa/initial_attestation.h"
 #include "bl2/include/tfm_boot_status.h"
 
 #ifdef TFM_PSA_API