dev-amdgpu: Update comments pointing to ROCK repo

It seems the tag name was changed which broke a few links in some
comments pointing to where definitions and struct come from. Update the
URLs and also use consistent version.

Change-Id: I7d6393f1f08d592989999a8a6f9c5bbdf1a9c992
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/58471
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
7 files changed