staging: vc04_services: Clean up tests if NULL returned on failure

Some functions like kmalloc/kzalloc return NULL on failure.
When NULL represents failure, !x is commonly used.

This was done using Coccinelle:
@@
expression *e;
identifier l1;
@@

e = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\)(...);
...
- e == NULL
+ !e
Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_util.c

@@ -52,7 +52,7 @@ int vchiu_queue_init(VCHIU_QUEUE_T *queue, int size)
 	sema_init(&queue->push, 0);
 
 	queue->storage = kzalloc(size * sizeof(VCHIQ_HEADER_T *), GFP_KERNEL);
-	if (queue->storage == NULL) {
+	if (!queue->storage) {
 		vchiu_queue_delete(queue);
 		return 0;
 	}