pinctrl: cy8c95x0: Implement ->gpio_request_enable() and ->gpio_set_direction()

Without ->gpio_request_enable() and ->gpio_set_direction()
callbacks it's not possible to mux GPIO via standard GPIO
interfaces (like `gpioget` or `gpioset` tools in user space).

Implement those functions to fill the above mentioned gap.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221010125221.28275-2-andriy.shevchenko@linux.intel.com


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