MFC r258941,267839:

Apply vendor improvements to oce(4) driver:

 - Add support to 20Gbps, 25Gbps, 40Gbps devices;
 - Add support to control adaptive interrupt coalescing (AIC)
   via sysctl;
 - Improve support of BE3 devices;
 - Big endian support fixes;

Many thanks to Emulex for their continued support of FreeBSD.

Submitted by:	Venkata Duvvuru <VenkatKumar.Duvvuru Emulex.Com>