sh_pfc_get_pin_index
int sh_pfc_get_pin_index(struct sh_pfc *pfc, unsigned int pin);
int idx = sh_pfc_get_pin_index(pfc, offset);
int idx = sh_pfc_get_pin_index(chip->pfc, offset);
int idx = sh_pfc_get_pin_index(pfc, grp->pins[i]);
int idx = sh_pfc_get_pin_index(pfc, grp->pins[i]);
int idx = sh_pfc_get_pin_index(pfc, offset);
int idx = sh_pfc_get_pin_index(pfc, offset);
int idx = sh_pfc_get_pin_index(pfc, offset);
int idx = sh_pfc_get_pin_index(pfc, _pin);
int idx = sh_pfc_get_pin_index(pfc, _pin);
int idx = sh_pfc_get_pin_index(pfc, _pin);