media: radio-si476x: don't fill in bus_info

Let the V4L2 core fill in bus_info.

This fixes this warning:

drivers/media/radio/radio-si476x.c: In function 'si476x_radio_querycap':
drivers/media/radio/radio-si476x.c:333:28: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 23 [-Wformat-truncation=]
  333 |                  "platform:%s", radio->v4l2dev.name);
      |                            ^~
drivers/media/radio/radio-si476x.c:332:9: note: 'snprintf' output between 10 and 45 bytes into a destination of size 32
  332 |         snprintf(capability->bus_info, sizeof(capability->bus_info),
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  333 |                  "platform:%s", radio->v4l2dev.name);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/radio/radio-si476x.c

@@ -328,9 +328,7 @@ static int si476x_radio_querycap(struct file *file, void *priv,
 
 	strscpy(capability->driver, radio->v4l2dev.name,
 		sizeof(capability->driver));
-	strscpy(capability->card,   DRIVER_CARD, sizeof(capability->card));
-	snprintf(capability->bus_info, sizeof(capability->bus_info),
-		 "platform:%s", radio->v4l2dev.name);
+	strscpy(capability->card, DRIVER_CARD, sizeof(capability->card));
 	return 0;
 }