openvswitch: Use ether_addr_copy

It's slightly smaller/faster for some architectures.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>

diff --cc net/openvswitch/actions.c
Simple merge

diff --cc net/openvswitch/flow.c
Simple merge

diff --cc net/openvswitch/flow_netlink.c
Simple merge