pinctrl: uniphier: Add missing audio pinmux settings for PXs2 SoC

Add missing audio I/O pinmux settings for PXs2 SoC.
This adds ain1 4ch pins, ain3 and aout1.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/1643376903-18623-2-git-send-email-hayashi.kunihiko@socionext.com


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