staging: rtl8723bs: use is_zero_ether_addr() instead of memcmp()

Use is_zero_ether_addr() instead of memcmp to check
if the ethernet address is all zeros.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20230804083841.1321554-1-yangyingliang@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>