MCSX_PEX_RX_SLAVE_VLAN_CFGX
reg = (req->dir == MCS_RX) ? MCSX_PEX_RX_SLAVE_VLAN_CFGX(idx) :
reg = MCSX_PEX_RX_SLAVE_VLAN_CFGX(0);
reg = MCSX_PEX_RX_SLAVE_VLAN_CFGX(1);