inet_diag: Remove _bh suffix in inet_diag_dump_reqs().

inet_diag_dump_reqs() is called from inet_diag_dump_icsk() with BH
disabled. So no need to disable BH in inet_diag_dump_reqs().

Signed-off-by: Hiroaki Shimoda <shimoda.hiroaki@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>