media: vivid: fix compile warning/error

Fix this warning:

vivid-core.c: In function 'vivid_create_devnodes':
vivid-core.c:1318:11: warning: unused variable 'i' [-Wunused-variable]
1318 | int ret, i;
| ^

and this error:

vivid-core.c: In function 'vivid_create_instance':
vivid-core.c:1885:47: error: 'cec_tx_bus_cnt' undeclared (first use in this function)
1885 | ret = vivid_create_devnodes(pdev, dev, inst, cec_tx_bus_cnt,
| ^~~~~~~~~~~~~~
vivid-core.c:1885:47: note: each undeclared identifier is reported only once for each function it appears in

Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/test-drivers/vivid/vivid-core.c

···
 				 unsigned out_type_counter[4])
 {
 	struct video_device *vfd;
-	int ret, i;
+	int ret;
 
 	if (dev->has_vid_cap) {
 		vfd = &dev->vid_cap_dev;
···
 	}
 
 	if (dev->has_vid_out) {
+#ifdef CONFIG_VIDEO_VIVID_CEC
+		int i;
+#endif
 		vfd = &dev->vid_out_dev;
 		snprintf(vfd->name, sizeof(vfd->name),
 			 "vivid-%03d-vid-out", inst);
···
 	struct vivid_dev *dev;
 	unsigned node_type = node_types[inst];
 	v4l2_std_id tvnorms_cap = 0, tvnorms_out = 0;
+	unsigned int cec_tx_bus_cnt = 0;
 	int ret;
 	int i;
-#ifdef CONFIG_VIDEO_VIVID_CEC
-	unsigned int cec_tx_bus_cnt = 0;
-#endif
 
 	/* allocate main vivid state structure */
 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);