arch-x86: Add some formats for CPL0 only instructions.

These are essentially the same as the Inst and CondInst formats, except
it adds a CPL check. If the CPL check fails, a new instruction will be
returned which is only a vehicle for delivering a GP fault.

Change-Id: Ie1e7fb6a6c04082437c4d4a25adc3e03be09ac72
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/55890
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
4 files changed