Add config option for X.509/TLS to use PSA

scripts/config.pl

@@ -37,6 +37,8 @@
 #       - this could be enabled if the respective tests were adapted
 #   MBEDTLS_ZLIB_SUPPORT
 #   MBEDTLS_PKCS11_C
+#   MBEDTLS_USE_PSA_CRYPTO
+#       - experimental, and more an alternative implementation than a feature
 #   and any symbol beginning _ALT
 #
 
@@ -98,6 +100,8 @@ MBEDTLS_ZLIB_SUPPORT
 MBEDTLS_PKCS11_C
 MBEDTLS_NO_UDBL_DIVISION
 MBEDTLS_NO_64BIT_MULTIPLICATION
+MBEDTLS_PSA_CRYPTO_SPM
+MBEDTLS_USE_PSA_CRYPTO
 _ALT\s*$
 );