anv: Allocate CPU-side memory for events

As discrete graphics looms, we really need to stop storing CPU data
structures in GPU memory.  One of the most egregious instances of this
was VkEvent where we had a CPU data structure living inside a dynamic
state pool allocation.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4690>
1 file changed