NTFS: 2.0.11 - Initial preparations for fake inode based attribute i/o.

- Move definition of ntfs_inode_state_bits to fs/ntfs/inode.h and
  do some macro magic (adapted from include/linux/buffer_head.h) to
  expand all the helper functions NInoFoo(), NInoSetFoo(), and
  NInoClearFoo().
- Add new flag to ntfs_inode_state_bits: NI_Sparse.
- Add new fields to ntfs_inode structure to allow use of fake inodes
  for attribute i/o: type, name, name_len. Also add new state bits:
  NI_Attr, which, if set, indicates the inode is a fake inode, and
  NI_MstProtected, which, if set, indicates the attribute uses multi
  sector transfer protection, i.e. fixups need to be applied after
  reads and before/after writes.
- Rename fs/ntfs/inode.c::ntfs_{new,clear,destroy}_inode() to
  ntfs_{new,clear,destroy}_extent_inode() and update callers.
- Use ntfs_clear_extent_inode() in fs/ntfs/inode.c::__ntfs_clear_inode()
  instead of ntfs_destroy_extent_inode().
- Cleanup memory deallocations in {__,}ntfs_clear_{,big_}inode().
- Make all operations on ntfs inode state bits use the NIno* functions.
- Set up the new ntfs inode fields and state bits in
  fs/ntfs/inode.c::ntfs_read_inode() and add appropriate cleanup of
  allocated memory to __ntfs_clear_inode().
- Cleanup ntfs_inode structure a bit for better ordering of elements
  w.r.t. their size to allow better packing of the structure in memory.

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