arch: Make the decoder moreBytes method virtual.

Change-Id: I9135508916de91172ec9649d59d80574ac2aaf16
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/52077
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Gabe Black <gabe.black@gmail.com>
7 files changed