greybus: audio: Add '<' to the print message for short messages

This increases readability a bit more, as it tells which value is actual
size and which one is expected size.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/audio.c

@@ -357,7 +357,7 @@ static int gb_i2s_mgmt_report_event_recv(u8 type, struct gb_operation *op)
 	}
 
 	if (op->request->payload_size < sizeof(*req)) {
-		dev_err(&connection->dev, "Short request received: %zu, %zu\n",
+		dev_err(&connection->dev, "Short request received (%zu < %zu)\n",
 			op->request->payload_size, sizeof(*req));
 		return -EINVAL;
 	}