net/unison240: Fix packaging
I removed OPTIONS_DEFINE in the last update by mistake
Reported by: fallout
Fixes: ba72838fff3e7fa001d247aa5409e889a7c864c3
MFH: 2025Q4
(cherry picked from commit 14befc22a972963c55d1166745c5086744cd1413)
Fixes: 1ba7408e1c2910a6220c399ab906c470ee5edaa3 (2025Q4)