After force converting the ABx500 bindings in the driver and
device tree sources, also update the binding documentation to
state that we are now using standard bindings.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

We use the same way to define pin muxing and pin configuration
than for nomadik. So pickup code from pinctrl_nomadik.c to be
able to implement pin multiplexing and pin configuration using
the device tree. Pin configuration uses generic parsing code.
Signed-off-by: NGabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: NPatrice Chotard <patrice.chotard@st.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>