Bug 1013: fix 2x2 direct eigensolver for identical eiegnvalues
Bug 1013: fix 2x2 direct eigensolver for identical eiegnvalues

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