There seems to be a discrepancy between the document TWR-LS1021A Reference Manual (Rev. 1 07/15) and the QorIQ LS1021A Data Sheet (Rev. 3 05/16) with regard to the SerDes usage. Figure 1. of the Data Sheet shows that only two Ethernet Controllers are associated with only 2 lanes the SerDes, whereas the Reference Manual shows all three Ethernet Controllers can be used with 3 lanes of the SerDes.
Please help clarify.