serviceAccount is deprecated

[staranto]

ocp4-playbooks/playbooks/roles/ocp-customization/tasks/powervm_rmc.yaml

daemonset.spec.template.spec.serviceAccount is deprecated in favor of serviceAccountName. No need to specify both.

[yussufsh]

Thanks for the PR.
Could you please sign the commit and ensure you have read the DCO.

[yussufsh]

Do you mind updating the commit? or we will need to close it.