Staging: iio/resolver: Fix prefer pr_warn over pr_warning in ad2s1210.c

This patch fixes following checkpatch.pl warning
WARNING: Prefer pr_warn(... to pr_warning(...
Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/resolver/ad2s1210.c

@@ -312,7 +312,7 @@ static ssize_t ad2s1210_store_control(struct device *dev,
 	if (st->pdata->gpioin) {
 		data = ad2s1210_read_resolution_pin(st);
 		if (data != st->resolution)
-			pr_warning("ad2s1210: resolution settings not match\n");
+			pr_warn("ad2s1210: resolution settings not match\n");
 	} else
 		ad2s1210_set_resolution_pin(st);
 
@@ -372,7 +372,7 @@ static ssize_t ad2s1210_store_resolution(struct device *dev,
 	if (st->pdata->gpioin) {
 		data = ad2s1210_read_resolution_pin(st);
 		if (data != st->resolution)
-			pr_warning("ad2s1210: resolution settings not match\n");
+			pr_warn("ad2s1210: resolution settings not match\n");
 	} else
 		ad2s1210_set_resolution_pin(st);
 	ret = len;