scripts: add_namespace: Fix coccicheck failed

Now all scripts in scripts/coccinelle to be automatically called
by coccicheck. However new adding add_namespace.cocci does not
support report mode, which make coccicheck failed.
This add "virtual report" to  make the coccicheck go ahead smoothly.

Fixes: eb8305aecb ("scripts: Coccinelle script for namespace dependencies.")
Acked-by: Julia Lawall <[email protected]>
Acked-by: Matthias Maennich <[email protected]>
Signed-off-by: YueHaibing <[email protected]>
Signed-off-by: Jessica Yu <[email protected]>

scripts/coccinelle/misc/add_namespace.cocci

@@ -6,6 +6,8 @@
 /// add a missing namespace tag to a module source file.
 ///
 
+virtual report
+
 @has_ns_import@
 declarer name MODULE_IMPORT_NS;
 identifier virtual.ns;