GPU - check device_prop.major, device_prop.minor meet our requirements

[nbarlowATI]

Nice to have for the future:
Check that the device we're running on meets our requirements.

How to check the device_prop:

cudaDeviceProp device_prop;

    // Use the default device (device 0) only, for now
    // cudaGetDeviceProp(&device_prop, 0);

device_prop.major or minor would then be integers representing the compute capability.

Note that we have currently tested on 37 (Tesla K80, e.g. an Azure NC6) and 60 (CSD3).