Remove duplicated country code from operating class lists

CA country code was included mistakenly (copy-paste..) in cn_op_class_cc
while it was supposed to be included only in us_op_class_cc. In
practice, this did not result in incorrect operation due to the
us_op_class_cc list being checked first. Anyway, better fix
cn_op_class_cc to avoid confusion here.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/common/ieee802_11_common.c

@@ -580,7 +580,7 @@ static const char *const jp_op_class_cc[] = {
 };
 
 static const char *const cn_op_class_cc[] = {
-	"CN", "CA", NULL
+	"CN", NULL
 };