make the ei_p* math functions overloads instead of template specializations
make the ei_p* math functions overloads instead of template
specializations

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