radeonsi: Decompress DCC textures in a render feedback loop.

radeonsi: Decompress DCC textures in a render feedback loop.

By using a counter to quickly reject textures that are not
bound to a framebuffer, the performance impact when binding
sampler_views/images is not too large.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>