cosmetic: update comments that refer to weston_surface_update_transform()

weston_surface_update_transform() no longer exists, except in comments.

Fix that.

[Pekka Paalanen: don't lose the full comment in compositor-drm.c.]

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
diff --git a/desktop-shell/shell.c b/desktop-shell/shell.c
index 3cc5733..3a5a702 100644
--- a/desktop-shell/shell.c
+++ b/desktop-shell/shell.c
@@ -4706,7 +4706,7 @@
 					 shsurf->view->geometry.y + dposy);
 	}
 
-	/* Repaint implies weston_surface_update_transform(), which
+	/* Repaint implies weston_view_update_transform(), which
 	 * lazily applies the damage due to rotation update.
 	 */
 	weston_compositor_schedule_repaint(shsurf->surface->compositor);