pinctrl: uniphier: fix input enable settings for PH1-sLD8

Currently, input enable settings are missing from the PH1-sLD8
pinctrl driver.  (All the entries in the pin table are set to
UNIPHIER_PIN_IECTRL_NONE).

Fill the table with correct values.

Fixes: 95372f9d ("pinctrl: UniPhier: add UniPhier PH1-sLD8 pinctrl driver")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>