radv: always dirty the framebuffer when restoring a subpass

radv: always dirty the framebuffer when restoring a subpass

The old code was not wrong because the transitions performed
after the resolves should re-emit the framebuffer if needed.

This change is mostly a no-op but it improves consistency
regarding other meta operations that need to save/restore subpasses.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>