MFC r254122, r254123, r256116, r255970, r247671, r269861, r268314, r256269,
  r255969, r256179, r230135, r254121, r255932, r255972, r255973, r256281,
  r256470, r257867, r259608, r269862, r271127, r272407, r257864, r256682,
  r258276, r254734, r247675, r254735 and r272683:

Hardware driver update from Mellanox Technologies, including:
 - improved performance
 - better stability
 - new features
 - bugfixes

Supported HCAs:
 - ConnectX-2
 - ConnectX-3
 - ConnectX-3 Pro

NOTE:
  - TSO feature needs r271946, which is not yet merged.

Sponsored by:	Mellanox Technologies