typhoon: get rid of redundant conditional before all to release_firmware()

There's no need to test for a NULL pointer before calling
release_firmware() since the function does that check itself, so
remove the redundant test.

Signed-off-by: Jesper Juhl <[e-mail]>
Acked-by: David Dillow <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

drivers/net/ethernet/3com/typhoon.c

···
 static void __exit
 typhoon_cleanup(void)
 {
-	if (typhoon_fw)
-		release_firmware(typhoon_fw);
+	release_firmware(typhoon_fw);
 	pci_unregister_driver(&typhoon_driver);
 }