Bill Hollings 2290e86cd9 Add support for VK_EXT_host_image_copy extension.
- MVKResource::getHostMemoryAddress() return nullptr if
  MVKDeviceMemory::getHostMemoryAddress() returns null pointer,
  regardless of local offset.
- Remove unnecessary  enum value kMVKVkFormatFeatureFlagsTexTransfer
  to reduce redundancy between read and transfer feature flag options.
- Fix spelling of mvkVkOffset3DFromMTLOrigin() (unrelated).
- MVKResource remove unnecessary inline qualifiers (unrelated).
- MVKDevice remove some obsolete commentary (unrelated).
2024-04-16 12:18:40 -04:00
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