MFC r252143:
  When RX checksum offloading is active, AX88772B will prepend a
  checksum header.  The header contains a received frame length but
  the defined length for AX88772B is different with other ASIX
  controllers.  When the RX checksum is off, AX88772B controller does
  not prepend a checksum header so driver has to use normal header
  length mask.
  This change should fix RX errors when RX checksum offloading is
  off.
MFC r252185:
  Add Lenovo USB 2.0 Ethernet adapter.

  PR:	usb/179920
MFC r252186:
  Add Lenovo USB 2.0 Ethernet adapter to the list of supported
  devices.