The evt platform has a different naming scheme from the other two
versions of Fomu.
This harmonises the naming of the rgb_led pads between all of the Fomu
variants.
Signed-off-by: Sean Cross <sean@xobs.io>
The `fomu` target represents a generic target that supports the Fomu
48 MHz crystal, with or without a PLL.
It does not yet include a BaseSoC, since that requires USB and
up5kspram, neither of which are present yet.
Signed-off-by: Sean Cross <sean@xobs.io>