MT_INT_RX_TXFREE_BAND1_EXT
irq_mask |= MT_INT_RX_TXFREE_BAND1_EXT;
wed->wlan.txfree_tbit = ffs(MT_INT_RX_TXFREE_BAND1_EXT) - 1;
if (intr1 & MT_INT_RX_TXFREE_BAND1_EXT)