bridge: using for_each_set_bit to simplify the code

Using for_each_set_bit() to simplify the code.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc net/bridge/br_fdb.c
Simple merge

diff --cc net/bridge/br_netlink.c
Simple merge