- nvAddressSpaceMapBuffer now accepts a flags parameter instead of
hardcoding NvMapBufferFlags_IsCacheable.
- NvBufferFlags was incorrect and was thus removed.
- nvBufferCreate/nvBufferCreateRw replaced with nvBufferCreate, with
an extra 'is_cacheable' bool parameter. There's no such thing as a
"read-only/read-write" buffer.
- nvBufferMakeCpuUncached/nvBufferMakeCpuCached were removed.