MFC rev. 1.13:
MFC rev. 1.13:

  Move the hard-coded ETHER_* options to where they belong --
  inside !if defined(KERNBUILDDIR).

  Utilize the fact the module will support all frames by default --
  it needs no ETHER_* options unless some frames need to be disabled.

  Fix the comment respectively.

  Don't forget to create fake opt_ef.h if no ETHER_* are set.

Approved by:	re (scottl)

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