Fix a pessimizing-move warning in GetDeviceLapackInfo()

clang reports:
./tensorflow/core/kernels/cuda_solvers.h:430:10: warning: moving a local object in a return statement prevents copy elision [-Wpessimizing-move]
  return std::move(new_dev_info);
         ^
./tensorflow/core/kernels/cuda_solvers.h:430:10: note: remove std::move call here
  return std::move(new_dev_info);
         ^~~~~~~~~~            ~