drm/legacy: place all drm legacy members under DRM_LEGACY.

This places a bunch of the legacy members of drm_device into
only being there when legacy is enabled.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_legacy.h

@@ -72,6 +72,7 @@ int drm_legacy_getsareactx(struct drm_device *d, void *v, struct drm_file *f);
 
 #define DRM_MAP_HASH_OFFSET 0x10000000
 
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
 static inline int drm_legacy_create_map_hash(struct drm_device *dev)
 {
 	return drm_ht_create(&dev->map_hash, 12);
@@ -81,6 +82,14 @@ static inline void drm_legacy_remove_map_hash(struct drm_device *dev)
 {
 	drm_ht_remove(&dev->map_hash);
 }
+#else
+static inline int drm_legacy_create_map_hash(struct drm_device *dev)
+{
+	return 0;
+}
+
+static inline void drm_legacy_remove_map_hash(struct drm_device *dev) {}
+#endif
 
 
 #if IS_ENABLED(CONFIG_DRM_LEGACY)

include/drm/drm_device.h

@@ -306,7 +306,7 @@ struct drm_device {
 
 	/* Everything below here is for legacy driver, never use! */
 	/* private: */
-
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
 	/* Context handle management - linked list of context handles */
 	struct list_head ctxlist;
 
@@ -353,6 +353,7 @@ struct drm_device {
 
 	/* Scatter gather memory */
 	struct drm_sg_mem *sg;
+#endif
 };
 
 #endif