[Beignet] cl_get_gt_device(): error while running OPenCL on Kabylake

[Rebecca N. Palmer]

> cl_get_gt_device(): error, unknown device: 5916
> [...] Is there a support missing for
> Kabylake/.?

Yes - that error means "Beignet does not recognize this device, so will 
not try to use it" (from 
https://cgit.freedesktop.org/beignet/tree/src/cl_device_id.c#n597 ; the 
supported devices list is in 
https://cgit.freedesktop.org/beignet/tree/src/cl_device_data.h ).