pinctrl: s32cc: embed generic struct pingroup

Use generic data structure to describe pin control groups in S32 SoC family
and drop duplicated struct members.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Chester Lin <clin@suse.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20230327062754.3326-4-clin@suse.com


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