pinctrl: uniphier: Add 5th LD20 MPEG2-TS input pin-mux setting

The 5th serial TS interface uses the following pins:
  hscin4_s: PCA[11-14]

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Link: https://lore.kernel.org/r/1564465410-9165-4-git-send-email-hayashi.kunihiko@socionext.com


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