drm/i915/guc: Update syntax of GuC log functions

drm/i915/guc: Update syntax of GuC log functions

We moved GuC log related data and code to separate files and
definition but we didn't change functions syntax to follow
object-verb pattern. Let's fix that before we continue with
next round of code refactoring.

v2: rebased

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Michal Winiarski <michal.winiarski@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180314144539.11152-1-michal.wajdeczko@intel.com
[ickle: checkpatch booleans]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>