Use the dkms from EPEL when install CUDA Toolkits on CentOS

###Use the dkms from EPEL.

yum install epel-release
yum install dkms
# download the rpm from the NVidia website
rpm -i cuda-repo-rhel7-8-0-local-ga2-8.0.54-1.ppc64le.rpm
yum clean expire-cache
yum install cuda