staging:iio:ad7793: Use kstrtol instead of strict_strtol

strict_strtol is deprecated in favor of kstrtol.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/drivers/staging/iio/adc/ad7793.c b/drivers/staging/iio/adc/ad7793.c
index 55d302d..843550d 100644
--- a/drivers/staging/iio/adc/ad7793.c
+++ b/drivers/staging/iio/adc/ad7793.c
@@ -204,7 +204,7 @@
 	}
 	mutex_unlock(&indio_dev->mlock);
 
-	ret = strict_strtol(buf, 10, &lval);
+	ret = kstrtol(buf, 10, &lval);
 	if (ret)
 		return ret;