Dispatch sign/verify funtions through the driver interface

Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
diff --git a/library/psa_crypto_driver_wrappers.h b/library/psa_crypto_driver_wrappers.h
index e82d093..956b648 100644
--- a/library/psa_crypto_driver_wrappers.h
+++ b/library/psa_crypto_driver_wrappers.h
@@ -28,6 +28,27 @@
 /*
  * Signature functions
  */
+psa_status_t psa_driver_wrapper_sign_message(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *key_buffer,
+    size_t key_buffer_size,
+    psa_algorithm_t alg,
+    const uint8_t *input,
+    size_t input_length,
+    uint8_t *signature,
+    size_t signature_size,
+    size_t *signature_length );
+
+psa_status_t psa_driver_wrapper_verify_message(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *key_buffer,
+    size_t key_buffer_size,
+    psa_algorithm_t alg,
+    const uint8_t *input,
+    size_t input_length,
+    const uint8_t *signature,
+    size_t signature_length );
+
 psa_status_t psa_driver_wrapper_sign_hash(
     const psa_key_attributes_t *attributes,
     const uint8_t *key_buffer, size_t key_buffer_size,