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: NJesper Juhl <jj@chaosbits.net>
Acked-by: NRasesh Mody <rmody@brocade.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

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

@@ -3546,8 +3546,6 @@ static void __exit
 bnad_module_exit(void)
 {
 	pci_unregister_driver(&bnad_pci_driver);
-
-	if (bfi_fw)
 	release_firmware(bfi_fw);
 }