v4l/dvb: use usb_make_path in usb-radio drivers

diff -r f4d7d0b84940 linux/drivers/media/radio/dsbr100.c
@@ -393,9 +393,11 @@
 static int vidioc_querycap(struct file *file, void *priv,
 					struct v4l2_capability *v)
 {
+	struct dsbr100_device *radio = video_drvdata(file);
+
 	strlcpy(v->driver, "dsbr100", sizeof(v->driver));
 	strlcpy(v->card, "D-Link R-100 USB FM Radio", sizeof(v->card));
-	sprintf(v->bus_info, "USB");
+	usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
 	v->version = RADIO_VERSION;
 	v->capabilities = V4L2_CAP_TUNER;
 	return 0;

diff -r f4d7d0b84940 linux/drivers/media/radio/radio-mr800.c
@@ -316,9 +316,11 @@
 static int vidioc_querycap(struct file *file, void *priv,
 					struct v4l2_capability *v)
 {
+	struct amradio_device *radio = video_drvdata(file);
+
 	strlcpy(v->driver, "radio-mr800", sizeof(v->driver));
 	strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
-	sprintf(v->bus_info, "USB");
+	usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
 	v->version = RADIO_VERSION;
 	v->capabilities = V4L2_CAP_TUNER;
 	return 0;

diff -r f4d7d0b84940 linux/drivers/media/radio/radio-si470x.c
@@ -1202,9 +1202,11 @@
 static int si470x_vidioc_querycap(struct file *file, void *priv,
 		struct v4l2_capability *capability)
 {
+	struct si470x_device *radio = video_drvdata(file);
+
 	strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
 	strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
-	sprintf(capability->bus_info, "USB");
+	usb_make_path(radio->usbdev, capability->bus_info, sizeof(capability->bus_info));
 	capability->version = DRIVER_KERNEL_VERSION;
 	capability->capabilities = V4L2_CAP_HW_FREQ_SEEK |
 		V4L2_CAP_TUNER | V4L2_CAP_RADIO;