media: replace strncpy() by strscpy()

The strncpy() function is being deprecated upstream. Replace
it by the safer strscpy().

While here, replace a few occurences of strlcpy() that were
recently added to also use strscpy().

Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/pci/bt8xx/dst.c

@@ -1100,7 +1100,8 @@ static int dst_get_device_id(struct dst_state *state)
 			/*	Card capabilities	*/
 			state->dst_hw_cap = p_dst_type->dst_feature;
 			pr_err("Recognise [%s]\n", p_dst_type->device_id);
-			strncpy(&state->fw_name[0], p_dst_type->device_id, 6);
+			strscpy((char *)state->fw_name, p_dst_type->device_id,
+				sizeof(state->fw_name));
 			/*	Multiple tuners		*/
 			if (p_dst_type->tuner_type & TUNER_TYPE_MULTI) {
 				switch (use_dst_type) {

drivers/media/pci/mantis/mantis_i2c.c

@@ -225,7 +225,7 @@ int mantis_i2c_init(struct mantis_pci *mantis)
 
 	init_waitqueue_head(&mantis->i2c_wq);
 	mutex_init(&mantis->i2c_lock);
-	strncpy(i2c_adapter->name, "Mantis I2C", sizeof(i2c_adapter->name));
+	strscpy(i2c_adapter->name, "Mantis I2C", sizeof(i2c_adapter->name));
 	i2c_set_adapdata(i2c_adapter, mantis);
 
 	i2c_adapter->owner	= THIS_MODULE;

drivers/media/pci/saa7134/saa7134-go7007.c

@@ -444,7 +444,7 @@ static int saa7134_go7007_init(struct saa7134_dev *dev)
 	sd = &saa->sd;
 	v4l2_subdev_init(sd, &saa7134_go7007_sd_ops);
 	v4l2_set_subdevdata(sd, saa);
-	strncpy(sd->name, "saa7134-go7007", sizeof(sd->name));
+	strscpy(sd->name, "saa7134-go7007", sizeof(sd->name));
 
 	/* Allocate a couple pages for receiving the compressed stream */
 	saa->top = (u8 *)get_zeroed_page(GFP_KERNEL);