ARM: nomadik: move the pin configuration to DT

This moves the pin configuration for the Nomadik over to the
device tree using Gabriel's bindings. Remove the auxdata
nailing down the name of the pin controller as this is no
longer necessary.

Cc: Gabriel Fernandez <gabriel.fernandez@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>