dts: bindings: pinctrl: add Renesas R-Car Pinmux

Renesas R-Car series contains a PFC (Pin Function Controller).
This module consists of registers for selecting the function of
the multiplexed pins and controls the pull-up resistor on each pin.

Signed-off-by: Julien Massot <julien.massot@iot.bzh>
3 files changed