Remove the port names that were deprecated in 21.0 and replace with the new names in GPU_VIPER.py. Change-Id: Ied770982ccd365638923c71a0ea8bcf9936d358e Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/44906 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>