stmmac: copy unicast mac address to MAC registers

[ Upstream commit a830405e ]

Currently stmmac driver not copying the valid ethernet
MAC address to MAC registers. This patch takes care
of updating the MAC register with MAC address.

Signed-off-by: Bhadram Varka <vbhadram@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Change-Id: I4a18c9c90cfc7b945ba4fc299f103b9094885420
Signed-off-by: Lee Jones <joneslee@google.com>