sh_pfc_config_mux
int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type);
ret = sh_pfc_config_mux(pfc, mark, PINMUX_TYPE_FUNCTION);
ret = sh_pfc_config_mux(pfc, grp->mux[i], PINMUX_TYPE_FUNCTION);
ret = sh_pfc_config_mux(pfc, pin->enum_id, PINMUX_TYPE_GPIO);
sh_pfc_config_mux(pfc, cfg->mux_mark, PINMUX_TYPE_FUNCTION);
ret = sh_pfc_config_mux(pfc, pin->enum_id, new_type);