anv: CreateDevice could probably be faster
I'm doing some profiling, and two parts of the function account for around 70% of its execution time:
anv_state_reserved_pool_init(&device->custom_border_colors,
&device->dynamic_state_pool,
MAX_CUSTOM_BORDER_COLORS,
sizeof(struct gfx8_border_color), 64);
result = anv_genX(device->info, init_device_state)(device);
any improvements welcome