Gets the subsystem id of a GPU.
ADLX_RESULT SubSystemId(const char** subSystemId)
[out]subSystemId const char** The pointer to a zero-terminated string where the subsystem id of the GPU is returned.
If the subsystem id is successfully returned, ADLX_OK is returned.
If the subsystem id is not successfully returned, an error code is returned.
Refer to ADLX_RESULT for success codes and error codes.
The returned memory buffer is valid within the lifetime of the IADLXGPU interface.
If the application uses the subsystem id beyond the lifetime of the IADLXGPU interface, the application must make a copy of the subsystem id.