staging: ks7010: use ether_addr_copy to copy ethernet address sa_data

Use ether_addr_copy kernel function to copy an ethernet address
instead of a simple memcpy with ETH_ALEN size.

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