gpio: regmap: Use generic request/free ops

Set the gpiochip request and free ops to the generic implementations.
This way a user can provide a gpio-ranges property defined for a pinmux,
easing muxing of gpio functions. Provided that the pin controller
implementents the pinmux op .gpio_request_enable(), pins will
automatically be muxed to their GPIO function when requested.

Signed-off-by: Sander Vanheule <sander@svanheule.net>
Acked-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/20250107201621.12467-1-sander@svanheule.net


Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>