drm/i915: Rename conditional GEM execution macros

After a brief discussion, we settled on a naming convention for the
conditional GEM debugging data that should be clearer to the casual
user: GEM_DEBUG

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170207102319.10910-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 896838c..b122c3c 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -144,7 +144,7 @@ struct intel_ring {
 
 	u32 head;
 	u32 tail;
-	GEM_BUG_ONLY_DECLARE(u32 advance);
+	GEM_DEBUG_DECL(u32 advance);
 
 	int space;
 	int size;
@@ -381,7 +381,7 @@ struct intel_engine_cs {
 	struct execlist_port {
 		struct drm_i915_gem_request *request;
 		unsigned int count;
-		GEM_BUG_ONLY_DECLARE(u32 context_id);
+		GEM_DEBUG_DECL(u32 context_id);
 	} execlist_port[2];
 	struct rb_root execlist_queue;
 	struct rb_node *execlist_first;
@@ -519,7 +519,7 @@ static inline void intel_ring_advance(struct intel_ring *ring)
 	 * reserved for the command packet (i.e. the value passed to
 	 * intel_ring_begin()).
 	 */
-	GEM_BUG_ONLY_ON(ring->tail != ring->advance);
+	GEM_DEBUG_BUG_ON(ring->tail != ring->advance);
 }
 
 static inline u32 intel_ring_offset(struct intel_ring *ring, void *addr)