media: bdisp: remove unnecessary IS_ERR() check

The "bdisp->clock" variable cannot be an error pointer here.  No need to
check.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/st/sti/bdisp/bdisp-v4l2.c

@@ -1394,8 +1394,7 @@ err_remove:
 	bdisp_debugfs_remove(bdisp);
 	v4l2_device_unregister(&bdisp->v4l2_dev);
 err_clk:
-	if (!IS_ERR(bdisp->clock))
-		clk_unprepare(bdisp->clock);
+	clk_unprepare(bdisp->clock);
 err_wq:
 	destroy_workqueue(bdisp->work_queue);
 	return ret;