anv: protected memory support
CTS :
$ ./deqp-vk -n dEQP-VK.protected*
Test run totals:
Passed: 1714/4352 (39.4%)
Failed: 0/4352 (0.0%)
Not supported: 2638/4352 (60.6%)
Warnings: 0/4352 (0.0%)
Waived: 0/4352 (0.0%)Beautifully protected vkcube :
https://github.com/krh/vkcube/pull/45