fs/ntfs3: Fix sparse warning in ni_fiemap

The interface of fiemap_fill_next_extent_k() was modified
to eliminate the sparse warning.

Fixes: d57431c6 ("fs/ntfs3: Do copy_to_user out of run_lock")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202406271920.hndE8N6D-lkp@intel.com/


Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>