[Replicant] [kernel_samsung_smdk4412] Add Ethernet for the devices that miss it

[Denis 'GNUtoo' Carikli]

Hi,

This adds Ethernet support for all the devices that don't have it
already in the kernel_samsung_smdk4412 repository.

The patches are untested at runtime and even at compilation time.

If we don't manage to confirm that this makes Ethernet work,
we could still merge this patchset as long as it doesn't break
compilation or introduce other regressions.

Denis.