Init PSA in pkey programs

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/programs/pkey/rsa_verify_pss.c b/programs/pkey/rsa_verify_pss.c
index e21e927..1637c31 100644
--- a/programs/pkey/rsa_verify_pss.c
+++ b/programs/pkey/rsa_verify_pss.c
@@ -58,6 +58,15 @@
 
     mbedtls_pk_init(&pk);
 
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    psa_status_t status = psa_crypto_init();
+    if (status != PSA_SUCCESS) {
+        mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
+                        (int) status);
+        goto exit;
+    }
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
     if (argc != 3) {
         mbedtls_printf("usage: rsa_verify_pss <key_file> <filename>\n");
 
@@ -129,6 +138,7 @@
 
 exit:
     mbedtls_pk_free(&pk);
+    mbedtls_psa_crypto_free();
 
     mbedtls_exit(exit_code);
 }