drm/i915/guc: Remove GUC_CTL_DEVICE_INFO parameter

It looks that GuC does not actively use GUC_CTL_DEVICE_INFO parameter
where we are passing GT type and Core family values.
Let's stop/remove setup of this parameter and remove related
definitions.

v2: (this time without squashed HAX)
  - New title and description
  - Remove also GUC_CORE_FAMILY_* definitions (Michel)
v3:
  - The removed define GUC_CTL_DEVICE_INFO has been restored (Michel)
  - Updated description (Sagar)
v4: rebase

Signed-off-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: John A Spotswood <john.a.spotswood@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michel Thierry <michel.thierry@intel.com>
Acked-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180413085245.57206-1-piotr.piorkowski@intel.com