MFC r179337.

MFC r179337.
  Add driver support for PCIe adapters based on JMicron JMC250
  gigabit ethernet and JMC260 fast ethernet controllers. ATM jme(4)
  supports all hardware features except RSS and multiple Tx/Rx queue.

  In these days most ethernet controller vendors take a ply of
  concealing hardware detailes from open source developers. As
  contrasted with these vendors JMicron provided all necessary
  information needed to write a stable driver during driver writing
  and answered many questions I had. They even helped fixing driver
  bugs with protocol analyzer. Many thanks to JMicron for their
  support of FreeBSD.

  H/W donated by:	JMicron