[PATCH v1 1/1] calibrate: Update header inclusion

[Andy Shevchenko]

While cleaning up some headers, I got a build error on this file:

init/calibrate.c:20:9: error: call to undeclared function 'kstrtoul'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

Update header inclusions to follow IWYU (Include What You Use)
principle.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 init/calibrate.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/init/calibrate.c b/init/calibrate.c
index 09c2e6102110..63be4c65bc52 100644
--- a/init/calibrate.c
+++ b/init/calibrate.c
@@ -5,12 +5,15 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
-#include <linux/jiffies.h>
 #include <linux/delay.h>
 #include <linux/init.h>
-#include <linux/timex.h>
-#include <linux/smp.h>
+#include <linux/jiffies.h>
+#include <linux/kstrtox.h>
 #include <linux/percpu.h>
+#include <linux/printk.h>
+#include <linux/smp.h>
+#include <linux/stddef.h>
+#include <linux/timex.h>
 
 unsigned long lpj_fine;
 unsigned long preset_lpj;
-- 
2.50.1