Attribute hipDeviceAttributeIsMultiGpuBoard for obtaining Device property isMultiGpuBoard is added.

On HIP path property obtaining done through hsa_iterate_agents and counting the devices of HSA_DEVICE_TYPE_GPU type.

P.S.
On multi-boards systems it might be problems with detection what board a GPU plugged into (not tested).

hipamd/tests/src/hipGetDeviceAttribute.cpp

@@ -72,6 +72,7 @@ int main(int argc, char *argv[])
     CHECK(test_hipDeviceGetAttribute(deviceId, hipDeviceAttributeMemoryBusWidth, props.memoryBusWidth));
 #endif
     CHECK(test_hipDeviceGetAttribute(deviceId, hipDeviceAttributeMultiprocessorCount, props.multiProcessorCount));
+    CHECK(test_hipDeviceGetAttribute(deviceId, hipDeviceAttributeIsMultiGpuBoard, props.isMultiGpuBoard));
     CHECK(test_hipDeviceGetAttribute(deviceId, hipDeviceAttributeComputeMode, props.computeMode));
     CHECK(test_hipDeviceGetAttribute(deviceId, hipDeviceAttributeL2CacheSize, props.l2CacheSize));
     CHECK(test_hipDeviceGetAttribute(deviceId, hipDeviceAttributeMaxThreadsPerMultiProcessor, props.maxThreadsPerMultiProcessor));