Document the bindings for PM8950 and PMI8950 PMIC MPPs.
Signed-off-by: AngeloGioacchino Del Regno <kholk11@gmail.com>
Link: https://lore.kernel.org/r/20191031103507.30678-5-kholk11@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>