drm/gma500: Use to_gtt_range() everywhere

Convert upcasts from struct drm_gem_object to struct gtt_range to
to_gtt_range(). Some places used container_of() directly.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211015084053.13708-3-tzimmermann@suse.de

drivers/gpu/drm/gma500/gem.c

@@ -117,7 +117,7 @@ static vm_fault_t psb_gem_fault(struct vm_fault *vmf);
 
 static void psb_gem_free_object(struct drm_gem_object *obj)
 {
-	struct gtt_range *gtt = container_of(obj, struct gtt_range, gem);
+	struct gtt_range *gtt = to_gtt_range(obj);
 
 	/* Remove the list map if one is present */
 	drm_gem_free_mmap_offset(obj);
@@ -267,7 +267,7 @@ static vm_fault_t psb_gem_fault(struct vm_fault *vmf)
 	dev = obj->dev;
 	dev_priv = to_drm_psb_private(dev);
 
-	r = container_of(obj, struct gtt_range, gem);	/* Get the gtt range */
+	r = to_gtt_range(obj);
 
 	/* Make sure we don't parallel update on a fault, nor move or remove
 	   something from beneath our feet */

drivers/gpu/drm/gma500/gma_display.c

@@ -349,8 +349,7 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
 
 		/* Unpin the old GEM object */
 		if (gma_crtc->cursor_obj) {
-			gt = container_of(gma_crtc->cursor_obj,
-					  struct gtt_range, gem);
+			gt = to_gtt_range(gma_crtc->cursor_obj);
 			psb_gtt_unpin(gt);
 			drm_gem_object_put(gma_crtc->cursor_obj);
 			gma_crtc->cursor_obj = NULL;
@@ -376,7 +375,7 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
 		goto unref_cursor;
 	}
 
-	gt = container_of(obj, struct gtt_range, gem);
+	gt = to_gtt_range(obj);
 
 	/* Pin the memory into the GTT */
 	ret = psb_gtt_pin(gt);
@@ -426,7 +425,7 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
 
 	/* unpin the old bo */
 	if (gma_crtc->cursor_obj) {
-		gt = container_of(gma_crtc->cursor_obj, struct gtt_range, gem);
+		gt = to_gtt_range(gma_crtc->cursor_obj);
 		psb_gtt_unpin(gt);
 		drm_gem_object_put(gma_crtc->cursor_obj);
 	}