Revert "freedreno: Cooperate with tc to stop checking the BC for resource_busy()."

This reverts commit 5cb043cf.

While the numbers were impressive for drawoverhead, it comes at the cost of additional flushes, which for gmem access (what we actually care about most!) would greatly increase the actual cost to render. Also, gl_driver2 overhead is increased, probably due to spending time in the kernel for the flushes.

drawoverhead's win came from the increased flushing causing the GPU to start processing the buffers sooner on everything but test 1, which already had some incremental flushing happening. That was certainly not intended by the change.