scnprintf is declared in linux/kernel.h, directly depend upon it.
Add missing SPDX comments.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/spark.c | 8 +++-----
 tools/perf/util/spark.h | 1 +
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/spark.c b/tools/perf/util/spark.c
index 70272a8b81a6..65ca253cc22e 100644
--- a/tools/perf/util/spark.c
+++ b/tools/perf/util/spark.c
@@ -1,9 +1,7 @@
-#include <stdio.h>
-#include <limits.h>
-#include <string.h>
-#include <stdlib.h>
+// SPDX-License-Identifier: GPL-2.0
 #include "spark.h"
-#include "stat.h"
+#include <limits.h>
+#include <linux/kernel.h>
 
 #define SPARK_SHIFT 8
 
diff --git a/tools/perf/util/spark.h b/tools/perf/util/spark.h
index 25402d7d7a64..78597c38ef35 100644
--- a/tools/perf/util/spark.h
+++ b/tools/perf/util/spark.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef SPARK_H
 #define SPARK_H 1
 
-- 
2.50.0.727.gbf7dc18ff4-goog