MTKSWITCH_LINK_UP
if ((portstatus & MTKSWITCH_LINK_UP) != 0)
(portstatus & MTKSWITCH_LINK_UP) != 0) ||
(portstatus & MTKSWITCH_LINK_UP) == 0)) {
res |= MTKSWITCH_LINK_UP;
res |= MTKSWITCH_LINK_UP;