MFC r196809:   fix a TX issue on big endian machines like powerpc or sparc64.  Now   zyd(4) should work on all architectures.
MFC r196809:
  fix a TX issue on big endian machines like powerpc or sparc64.  Now
  zyd(4) should work on all architectures.

  Obtained from:	OpenBSD

Approved by:	re (kib)

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