sim,misc: Rename M5OP_ANNOTATE to M5OP_RESERVED1.

The M5OP_ANNOTATE constant is unused and treated as a reserved op in
gem5. Rename it to make it official and consistent.

Change-Id: Id5fe6a3aa402a2e0cd187503abff9b09e81b3724
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27235
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
2 files changed