iio: replace strict_strtoul() with kstrtoul()

The usage of strict_strtoul() is not preferred, because
strict_strtoul() is obsolete. Thus, kstrtoul() should be
used.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
index 9e6da72..f148d00 100644
--- a/drivers/iio/adc/max1363.c
+++ b/drivers/iio/adc/max1363.c
@@ -660,7 +660,7 @@
 	unsigned long val;
 	bool found = false;
 
-	ret = strict_strtoul(buf, 10, &val);
+	ret = kstrtoul(buf, 10, &val);
 	if (ret)
 		return -EINVAL;
 	for (i = 0; i < ARRAY_SIZE(max1363_monitor_speeds); i++)
diff --git a/drivers/iio/trigger/iio-trig-sysfs.c b/drivers/iio/trigger/iio-trig-sysfs.c
index b727bde..effcd0a 100644
--- a/drivers/iio/trigger/iio-trig-sysfs.c
+++ b/drivers/iio/trigger/iio-trig-sysfs.c
@@ -34,7 +34,7 @@
 	int ret;
 	unsigned long input;
 
-	ret = strict_strtoul(buf, 10, &input);
+	ret = kstrtoul(buf, 10, &input);
 	if (ret)
 		return ret;
 	ret = iio_sysfs_trigger_probe(input);
@@ -53,7 +53,7 @@
 	int ret;
 	unsigned long input;
 
-	ret = strict_strtoul(buf, 10, &input);
+	ret = kstrtoul(buf, 10, &input);
 	if (ret)
 		return ret;
 	ret = iio_sysfs_trigger_remove(input);