fix(scmi): add missing \n in ERROR message

Correct ERROR message in scmi_process_message().

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I55e337a3904045aa188975f6a7ed3e989678f571
diff --git a/drivers/scmi-msg/entry.c b/drivers/scmi-msg/entry.c
index 3537fbe..399115c 100644
--- a/drivers/scmi-msg/entry.c
+++ b/drivers/scmi-msg/entry.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: BSD-3-Clause
 /*
- * Copyright (c) 2015-2020, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2022, Arm Limited and Contributors. All rights reserved.
  * Copyright (c) 2019-2020, Linaro Limited
  */
 
@@ -84,7 +84,7 @@
 		return;
 	}
 
-	ERROR("Agent %u Protocol 0x%x Message 0x%x: not supported",
+	ERROR("Agent %u Protocol 0x%x Message 0x%x: not supported\n",
 	      msg->agent_id, msg->protocol_id, msg->message_id);
 
 	scmi_status_response(msg, SCMI_NOT_SUPPORTED);