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Fix for issue #394.

Created by: silabs-oysteink

  • Removed 'enable_i' from LFSR modules.
  • It is no longer possible to write a locked up value to the LFSR, detection is now independent of the enabling of dummies or hint replacements.

Not SEC clean:

  • Alert minor caused by writing a locked up value when dummies/hint replacements are disabled.
  • Previously, a locked up value could be stored in the LFSR, resulting in a difference in which dummy or hint was generated on the first instruction after enabling.

Signed-off-by: Oystein Knauserud Oystein.Knauserud@silabs.com

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