livepatch: __klp_shadow_get_or_alloc() is local to shadow.c

... therefore make it static.

Fixes: 439e7271dc2 ("livepatch: introduce shadow variable API")
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

kernel/livepatch/shadow.c

@@ -113,7 +113,7 @@ void *klp_shadow_get(void *obj, unsigned long id)
 }
 EXPORT_SYMBOL_GPL(klp_shadow_get);
 
-void *__klp_shadow_get_or_alloc(void *obj, unsigned long id, void *data,
+static void *__klp_shadow_get_or_alloc(void *obj, unsigned long id, void *data,
 		       size_t size, gfp_t gfp_flags, bool warn_on_exist)
 {
 	struct klp_shadow *new_shadow;