hk: unbind VAs

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33682>

src/asahi/lib/agx_device.c

@@ -113,7 +113,7 @@ agx_bo_bind(struct agx_device *dev, struct agx_bo *bo, uint64_t addr,
    struct drm_asahi_gem_bind gem_bind = {
       .op = unbind ? ASAHI_BIND_OP_UNBIND : ASAHI_BIND_OP_BIND,
       .flags = flags,
-      .handle = bo->handle,
+      .handle = bo ? bo->handle : 0,
       .vm_id = dev->vm_id,
       .offset = offset_B,
       .range = size_B,

src/asahi/vulkan/hk_buffer.c

@@ -141,8 +141,10 @@ hk_DestroyBuffer(VkDevice device, VkBuffer _buffer,
       return;
 
    if (buffer->va) {
-      // TODO
-      // agx_bo_unbind_vma(dev->ws_dev, buffer->addr, buffer->vma_size_B);
+      /* Unbind the VA */
+      dev->dev.ops.bo_bind(&dev->dev, NULL, buffer->addr, buffer->va->size_B, 0,
+                           0, true);
+
       agx_va_free(&dev->dev, buffer->va);
    }