V4L/DVB (6662): Fix standard selection for PAL

Not all 8MHz firmware are marked with F8MHz.
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/tuner-xc2028.c

@@ -734,6 +734,9 @@ static int check_firmware(struct dvb_frontend *fe, enum tuner_mode new_mode,
 		new_fw.id |= parse_audio_std_option();
 
 	rc = load_firmware(fe, new_fw.type, &new_fw.id);
+	if (rc == -ENOENT)
+		rc = load_firmware(fe, new_fw.type & ~F8MHZ, &new_fw.id);
+
 	if (rc < 0)
 		goto fail;