staging: most: v4l2-aim: optimize list_for_each_entry_safe

As the function get_aim_dev() does not delete elements of the list, the
use of macro list_for_each_entry_safe is not necessary.

This patch replaces the macro list_for_each_entry_safe with the macro
list_for_each_entry.
Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/most/aim-v4l2/video.c

@@ -393,11 +393,11 @@ static const struct video_device aim_videodev_template = {
 static struct most_video_dev *get_aim_dev(
 	struct most_interface *iface, int channel_idx)
 {
-	struct most_video_dev *mdev, *tmp;
+	struct most_video_dev *mdev;
 	unsigned long flags;
 
 	spin_lock_irqsave(&list_lock, flags);
-	list_for_each_entry_safe(mdev, tmp, &video_devices, list) {
+	list_for_each_entry(mdev, &video_devices, list) {
 		if (mdev->iface == iface && mdev->ch_idx == channel_idx) {
 			spin_unlock_irqrestore(&list_lock, flags);
 			return mdev;