net: Set the network link address type when setting link address

The interface L2 address type is set at the same time as the
L2 address is set to the network interface. This is most
convinient place to set the address type.

Change-Id: I712d7357d075959eb79df3463141cfbc6d163a74
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>