V4L/DVB: opera1: remove unneeded NULL check

"fw" is always a non-NULL pointer at this point, and anyway
release_firmware() accepts NULL pointers.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/dvb-usb/opera1.c b/drivers/media/dvb/dvb-usb/opera1.c
index 6b22ec6..f896337 100644
--- a/drivers/media/dvb/dvb-usb/opera1.c
+++ b/drivers/media/dvb/dvb-usb/opera1.c
@@ -483,9 +483,7 @@
 		}
 	}
 	kfree(p);
-	if (fw) {
-		release_firmware(fw);
-	}
+	release_firmware(fw);
 	return ret;
 }