misc: Stop including arch/pcstate.hh.

Change-Id: Ic9ea62ae9c59fd838175fd6af4c075101d46a0b1
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/52067
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
17 files changed