layers: Fixup MappedMemory variable names for style
layers: Fixup MappedMemory variable names for style

Change-Id: I4f8aae213753dc69ae28a945d7f34cff2af7ccd9

KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers