[media] dvb_usb_v2: restore .firmware - pointer to name

Most commonly only one firmware is used by the driver
and it is not needed to selected run time. So restore
old functionality but allow .get_firmware_name() callback
to override it.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dvb-usb/dvb_usb.h

@@ -219,12 +219,13 @@ struct dvb_usb_device_properties {
 #define CYPRESS_FX2     3
 	int        usb_ctrl;
 
+	int size_of_priv;
+
+	const char *firmware;
+	int (*get_firmware_name) (struct dvb_usb_device *, const char **);
 #define RECONNECTS_USB                  1
 	int (*download_firmware) (struct dvb_usb_device *,
 			const struct firmware *);
-	int (*get_firmware_name) (struct dvb_usb_device *, const char **);
-
-	int size_of_priv;
 
 	int num_adapters;
 	int (*get_adapter_count) (struct dvb_usb_device *);

drivers/media/dvb/dvb-usb/dvb_usb_firmware.c

@@ -96,9 +96,13 @@ int dvb_usb_download_firmware(struct dvb_usb_device *d)
 	const struct firmware *fw = NULL;
 	const char *name;
 
-	ret = d->props.get_firmware_name(d, &name);
-	if (ret < 0)
-		return ret;
+	/* resolve firmware name */
+	name = d->props.firmware;
+	if (d->props.get_firmware_name) {
+		ret = d->props.get_firmware_name(d, &name);
+		if (ret < 0)
+			return ret;
+	}
 
 	ret = request_firmware(&fw, name, &d->udev->dev);
 	if (ret != 0) {