bna: remove redundant NULL test before release_firmware()

release_firmware() does its own NULL test so explicit test before call
is unneeded.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Rasesh Mody <rmody@brocade.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/net/ethernet/brocade/bna/bnad.c

@@ -3546,9 +3546,7 @@ static void __exit
 bnad_module_exit(void)
 {
 	pci_unregister_driver(&bnad_pci_driver);
-
-	if (bfi_fw)
-		release_firmware(bfi_fw);
+	release_firmware(bfi_fw);
 }
 
 module_init(bnad_module_init);