anv/allocator: Embed the block_pool in the state_pool

Now that the state stream is allocating off of the state pool, there's
no reason why we need the block pool to be separate.

Reviewed-by: Juan A. Suarez Romero <jasuarez@igalia.com>

src/intel/vulkan/genX_blorp_exec.c

@@ -132,7 +132,7 @@ blorp_alloc_vertex_buffer(struct blorp_batch *batch, uint32_t size,
       anv_cmd_buffer_alloc_dynamic_state(cmd_buffer, size, 64);
 
    *addr = (struct blorp_address) {
-      .buffer = &cmd_buffer->device->dynamic_state_block_pool.bo,
+      .buffer = &cmd_buffer->device->dynamic_state_pool.block_pool.bo,
       .offset = vb_state.offset,
    };