iio: core: Fix suspicious sizeof usage

Pointer size is variours in different system, say 32bit for 4 and 64bit
for 8. The 'sizeof(infomask)' may lead to wrong bit numbers.
Signed-off-by: NOrson Zhai <orson.zhai@spreadtrum.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/iio/industrialio-core.c

@@ -1089,7 +1089,7 @@ static int iio_device_add_info_mask_type(struct iio_dev *indio_dev,
 {
 	int i, ret, attrcount = 0;
 
-	for_each_set_bit(i, infomask, sizeof(infomask)*8) {
+	for_each_set_bit(i, infomask, sizeof(*infomask)*8) {
 		if (i >= ARRAY_SIZE(iio_chan_info_postfix))
 			return -EINVAL;
 		ret = __iio_add_chan_devattr(iio_chan_info_postfix[i],
@@ -1118,7 +1118,7 @@ static int iio_device_add_info_mask_type_avail(struct iio_dev *indio_dev,
 	int i, ret, attrcount = 0;
 	char *avail_postfix;
 
-	for_each_set_bit(i, infomask, sizeof(infomask) * 8) {
+	for_each_set_bit(i, infomask, sizeof(*infomask) * 8) {
 		avail_postfix = kasprintf(GFP_KERNEL,
 					  "%s_available",
 					  iio_chan_info_postfix[i]);