Freehub body/ Cassette Compatibility
SRAM 11spd MTB = XD Driver Body
SRAM 10spd MTB, Shimano 10spd or 11spd MTB = Standard freehub body

SRAM created the XD standard to offer space for a 10T cassette cog.  SRAM 11-speed cassettes will require a XD driver body. 
Shimano’s new 11-speed XTR and XT drivetrains use a standard 9/10sp Shimano-type freehub body (not the XD driver body)