Merge changes from topic "st_gpio_update" into integration

* changes:
  fix(st-gpio): configure each GPIO mux as secure for STM32MP2
  feat(st-gpio): add set GPIO config API
  fix(stm32mp1): remove unnecessary assert on GPIO_BANK_A value
  refactor(st): use GPIO banks definition from bindings
  feat(dt-bindings): describe ST GPIO banks and config