staging: ks7010: use ether_addr_copy in ks_wlan_net_start

Instead of use memcpy for copying ethernet addresses, use
ether_addr_copy that do the same.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>