Revert "anv: limit URB reconfigurations when using blorp"

In commit 0d46e404 ("anv: limit URB reconfigurations when using blorp") we tried to limit the number of URB reconfiguration by checking if the last allocation is large enough to fit the blorp dispatch.

We used the last bound pipeline to compare the allocation. The problem with this is that the pipeline is bound but its commands might not have been emitted into the command buffer yet.

Let's just revert commit 0d46e404 since it didn't seem to yield any performance improvement.

Signed-off-by: Lionel Landwerlin lionel.g.landwerlin@intel.com