radv: Enable DCC for storage images on GFX10.

This has no regressions in CTS with RADV_DEBUG=forcecompress. Furthermore I did some basic testing with GTA IV to check for corruption with renderloops in d9VK and they didn't occur. (I wonder if the coherency is better now that the CB is a client of the L2/L1 cache).

Did a basic test in RoTR where it was ~1.5% faster, but haven't tested across the board.