[media] blackfin-capture: Use kcalloc() in bcap_init_sensor_formats()

A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus reuse the corresponding function "kcalloc".

This issue was detected by using the Coccinelle software.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/blackfin/bfin_capture.c

@@ -169,7 +169,7 @@ static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 	if (!num_formats)
 		return -ENXIO;
 
-	sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
+	sf = kcalloc(num_formats, sizeof(*sf), GFP_KERNEL);
 	if (!sf)
 		return -ENOMEM;