[media] dvb_usb_v2: use identify_state() to resolve firmware name

Merge get_firmware_name() to identify_state().

It is wise to resolve firmware name in that routine as it does
decision wether or not to load firmware at all. It is one very
rarely needed callback less.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/dvb-usb/af9015.c b/drivers/media/dvb/dvb-usb/af9015.c
index 101b399..6cecd75 100644
--- a/drivers/media/dvb/dvb-usb/af9015.c
+++ b/drivers/media/dvb/dvb-usb/af9015.c
@@ -324,7 +324,7 @@
 	.functionality = af9015_i2c_func,
 };
 
-static int af9015_identify_state(struct dvb_usb_device *d)
+static int af9015_identify_state(struct dvb_usb_device *d, const char **name)
 {
 	int ret;
 	u8 reply;