ACPI: sysfs: Use kstrtobool() instead of strtobool()

strtobool() is the same as kstrtobool().
However, the latter is more used within the kernel.

In order to remove strtobool() and slightly simplify kstrtox.h, switch to
the other function name.

While at it, include the corresponding header file (<linux/kstrtox.h>)

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/sysfs.c

@@ -9,6 +9,7 @@
 #include <linux/bitmap.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/kstrtox.h>
 #include <linux/moduleparam.h>
 
 #include "internal.h"
@@ -992,7 +993,7 @@ static ssize_t force_remove_store(struct kobject *kobj,
 	bool val;
 	int ret;
 
-	ret = strtobool(buf, &val);
+	ret = kstrtobool(buf, &val);
 	if (ret < 0)
 		return ret;