tb_switch_find_vse_cap
ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_PLUG_EVENTS);
ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_TIME2);
ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_LINK_CONTROLLER);
ret = tb_switch_find_vse_cap(sw, TB_VSE_CAP_CP_LP);
int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);