Documentation of enum VmaMemoryUsage: Added DirectX 12 equivalents.
Documentation of enum VmaMemoryUsage: Added DirectX 12 equivalents.

GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator,GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator,GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator