pinctrl: qcom: spmi-gpio: Add PM/PMI8950 compatibility

The PM8950 features 8 GPIOs with hole in 3 and PMI8950 has
only two; these PMICs are totally compatible with this driver.

Signed-off-by: AngeloGioacchino Del Regno <kholk11@gmail.com>
Link: https://lore.kernel.org/r/20191031103507.30678-2-kholk11@gmail.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>