Revert "radeonsi: remove CB sync after FMASK and DCC decompression"

This reverts commit 3527d9f81d.

It broke piglit glx@glx-visuals-depth/glx@glx-visuals-stencil on Navi
14.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31323>

src/gallium/drivers/radeonsi/si_blit.c

@@ -515,6 +515,12 @@ static void si_blit_decompress_color(struct si_context *sctx, struct si_texture
          util_blitter_custom_color(sctx->blitter, cbsurf, custom_blend);
          si_blitter_end(sctx);
 
+         if (custom_blend == sctx->custom_blend_fmask_decompress ||
+             custom_blend == sctx->custom_blend_dcc_decompress) {
+            sctx->barrier_flags |= SI_BARRIER_SYNC_AND_INV_CB;
+            si_mark_atom_dirty(sctx, &sctx->atoms.s.barrier);
+         }
+
          /* When running FMASK decompression with DCC, we need to run the "eliminate fast clear" pass
           * separately because FMASK decompression doesn't eliminate DCC fast clear. This makes
           * render->texture transitions more expensive. It can be disabled by