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/crypto/crypto_init.c b/secure_fw/services/crypto/crypto_init.c
index e32ceb0..9e061b2 100644
--- a/secure_fw/services/crypto/crypto_init.c
+++ b/secure_fw/services/crypto/crypto_init.c
@@ -21,7 +21,7 @@
 #endif
 
 #ifdef TFM_PSA_API
-#include "psa_service.h"
+#include "psa/service.h"
 #include "tfm_crypto_signal.h"
 #include "secure_fw/core/tfm_memory_utils.h"