freedreno/fdl: Set swizzle on storage descriptor

It appears to be unused by ldib/stib, but it will let us use isam on IBO
descriptors for bindless images.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15114>

src/freedreno/fdl/fd6_view.c

@@ -341,6 +341,7 @@ fdl6_view_init(struct fdl6_view *view, const struct fdl_layout **layouts,
 
    view->storage_descriptor[0] =
       A6XX_TEX_CONST_0_FMT(storage_format) |
+      fdl6_texswiz(args, has_z24uint_s8uint) |
       A6XX_TEX_CONST_0_TILE_MODE(tile_mode);
    view->storage_descriptor[1] = view->descriptor[1];
    view->storage_descriptor[2] =