add ei_predux_mul for AltiVec
add ei_predux_mul for AltiVec

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