Add the missing iounmap() before return from bnad_init()
in the error handling case.
Introduced by commit 01b54b14
(bna: tx rx cleanup fix).
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>