RealSchur: change parameter lists; minor rewrite of computeShift().
RealSchur: change parameter lists; minor rewrite of computeShift().

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