Add the bindings for the pinmux functions in the
ARTPEC-6 SoC, including bias and drive strength.
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>