Use kzalloc that is order of magnitude faster and saves .text compared with kcalloc

Author: Bruno George de Moraes

sound/arm/bcm2835-vchiq.c

@@ -261,11 +261,10 @@ static AUDIO_INSTANCE_T *vc_vchi_audio_init(VCHI_INSTANCE_T vchi_instance,
 		return NULL;
 	}
 	/* Allocate memory for this instance */
-	instance = kmalloc(sizeof(*instance), GFP_KERNEL);
+	instance = kzalloc(sizeof(*instance), GFP_KERNEL);
 	if (!instance)
 		return NULL;
 
-	memset(instance, 0, sizeof(*instance));
 	instance->num_connections = num_connections;
 
 	/* Create a lock for exclusive, serialized VCHI connection access */