All the approriate gpio_xxx functions now call check_gpio_param. This
provides an easy way for a project to add simple range checking by
defining a final version of check_gpio_param, which whatever error
mechanism it chooses if an invalid value is passed.
Refs #2736
Some RP2350 GPIO_FUNC_ enums don't match the values defined in the
rp2350 hardware header but the actual values shouldn't matter if only
the enums are used (i.e. no magic numbers).
Refs #2736
