test_driver_key_management: make opaque [un]wrapping functions public

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/include/test/drivers/key_management.h b/tests/include/test/drivers/key_management.h
index 526adbb..9a68777 100644
--- a/tests/include/test/drivers/key_management.h
+++ b/tests/include/test/drivers/key_management.h
@@ -67,6 +67,14 @@
 psa_status_t mbedtls_test_opaque_init(void);
 void mbedtls_test_opaque_free(void);
 
+psa_status_t mbedtls_test_opaque_wrap_key(
+    const uint8_t *key, size_t key_length, uint8_t *wrapped_key_buffer,
+    size_t wrapped_key_buffer_size, size_t *wrapped_key_buffer_length);
+
+psa_status_t mbedtls_test_opaque_unwrap_key(
+    const uint8_t *wrapped_key, size_t wrapped_key_length, uint8_t *key_buffer,
+    size_t key_buffer_size, size_t *key_buffer_length);
+
 psa_status_t mbedtls_test_transparent_generate_key(
     const psa_key_attributes_t *attributes,
     uint8_t *key, size_t key_size, size_t *key_length);