scripts/coccinelle: find constant additions that could be bit ors

Semantic patch (http://coccinelle.lip6.fr/

) to check for constants that are
added but are used elsewhere as bitmasks.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>