This reverts commit c3eccf9ef4.
Reason for revert: As we discussed, it might be valid for the chipset to drop BC (non-ARP, non-IPv4) packets in the hardware instead of the firmware. To ensure this test doesn't fail on those chipsets, using unicast packets for testing seems more suitable.
Change-Id: I89debf79965cf3ea62484c443e952bd137818efc