* new function - fsync_bdev() (analog of fsync_dev(), but takes
  struct block_device * instead of kdev_t.  Callers of fsync_dev()
  that have struct block_device in question are using fsync_bdev()
  now.
* old code for fsync_dev(NODEV) had been moved to sys_sync().
  Other callers of fsync_dev(NODEV) are calling sys_sync() now.
* fsync_dev() became a wrapper fro fsync_bdev().
* sync_dev() (not used anywhere in the tree) is gone.
* i2oblock.c had fsync_dev() called in ->release().  Removed.
* s390/block/xparm.c was doing fsync_dev() on its devices in
  cleanup_module().  Removed.