integrate Hauke's 2x2 direct symmetric eigenvalues solver
integrate Hauke's 2x2 direct symmetric eigenvalues solver

ROCmSoftwarePlatform/hipeigen,pasuka/eigen,TSC21/Eigen,toastedcrumpets/eigen,pasuka/eigen,pasuka/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,Zefz/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,Zefz/eigen,Zefz/eigen,ROCmSoftwarePlatform/hipeigen,toastedcrumpets/eigen,pasuka/eigen,TSC21/Eigen,pasuka/eigen,Zefz/eigen,toastedcrumpets/eigen,TSC21/Eigen,TSC21/Eigen,ritsu1228/eigen,toastedcrumpets/eigen,ritsu1228/eigen,ritsu1228/eigen