drm/i915: Make various init functions take dev_priv

Like GEM init, GUC init, MOCS init and context creation.

Enables them to lose dev_priv locals.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

drivers/gpu/drm/i915/intel_lrc.h

@@ -70,7 +70,7 @@ void intel_logical_ring_cleanup(struct intel_engine_cs *engine);
 int logical_render_ring_init(struct intel_engine_cs *engine);
 int logical_xcs_ring_init(struct intel_engine_cs *engine);
 
-int intel_engines_init(struct drm_device *dev);
+int intel_engines_init(struct drm_i915_private *dev_priv);
 
 /* Logical Ring Contexts */