IGC_ICR_LSC
if (reg_icr & (IGC_ICR_RXSEQ | IGC_ICR_LSC))
if (reg_icr & (IGC_ICR_RXSEQ | IGC_ICR_LSC)) {
#define IGC_IMS_LSC IGC_ICR_LSC /* Link Status Change */
#define IGC_ICS_LSC IGC_ICR_LSC /* Link Status Change */