coccinelle: bugon: reduce rule applicability

Rule r is only use in org or report mode, so only execute it in those
cases.

Signed-off-by: Julia Lawall <[e-mail]>
Signed-off-by: Michal Marek <[e-mail]>

scripts/coccinelle/misc/bugon.cocci

···
 //  For org and report mode
 //----------------------------------------------------------
 
-@r@
+@r depends on (org || report)@
 expression e;
 position p;
 @@