scripts: coccinelle: boolinit: drop warnings on named constants

Coccinelle doesn't always have access to the values of named
(#define) constants, and they may likely often be bound to true
and false values anyway, resulting in false positives.  So stop
warning about them.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

scripts/coccinelle/misc/boolinit.cocci

@@ -136,9 +136,14 @@ position p1;
 @r4 depends on !patch@
 bool b;
 position p2;
+identifier i;
 constant c != {0,1};
 @@
+(
+ b = i
+|
 *b@p2 = c
+)
 
 @script:python depends on org@
 p << r1.p;