This enabled pin config on the Gemini driver and implements
pin skew/delay so that the ethernet pins clocking can be
properly configured.
Acked-by: NHans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The Cortina Gemini pin controller uses the standard pin control
bindings for muxing functions with groups so these bindings
should be entirely uncontroversial.

Cc: devicetree@vger.kernel.org
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>