D3D11: Skip DepthTexturesWithMipmaps on AMD/D3D11. Possible driver bug. Bug: angleproject:3342 Change-Id: Ia171a7ac0d764859c4440b1fe2986aa931ff75c2 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1550799 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>