rp1_pctl_get_group_pins
.get_group_pins = rp1_pctl_get_group_pins,
rp1_pctl_get_group_pins(pctldev, group_selector, &pins, &num_pins);
ret = rp1_pctl_get_group_pins(pctldev, selector, &pins, &npins);
ret = rp1_pctl_get_group_pins(pctldev, selector, &pins, &npins);