iio: Use parens with sizeof

Prefer 'sizeof(var)' over 'sizeof var' as reported by checkpatch.pl.

Signed-off-by: Joe Simmons-Talbott <joetalbott@gmail.com>
Link: https://lore.kernel.org/r/20220717153438.10800-1-joetalbott@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
index efc0158..3e1b1fb 100644
--- a/drivers/iio/industrialio-trigger.c
+++ b/drivers/iio/industrialio-trigger.c
@@ -364,7 +364,7 @@ struct iio_poll_func
 	va_list vargs;
 	struct iio_poll_func *pf;
 
-	pf = kmalloc(sizeof *pf, GFP_KERNEL);
+	pf = kmalloc(sizeof(*pf), GFP_KERNEL);
 	if (pf == NULL)
 		return NULL;
 	va_start(vargs, fmt);
@@ -553,7 +553,7 @@ struct iio_trigger *viio_trigger_alloc(struct device *parent,
 	struct iio_trigger *trig;
 	int i;
 
-	trig = kzalloc(sizeof *trig, GFP_KERNEL);
+	trig = kzalloc(sizeof(*trig), GFP_KERNEL);
 	if (!trig)
 		return NULL;