Vulkan: Consider PowerVR hardware coherent for framebuffer fetch Bug: angleproject:377923479 Change-Id: I5a51b0d82e55c6153dfcaa240aa08456560f2c7b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6032832 Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Cody Northrop <cnorthrop@google.com>