nvmet: don't check for NULL pointer before kfree in nvmet_host_release

And add an empty line after the variable declaration.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/nvme/target/configfs.c

@@ -1808,8 +1808,8 @@ static struct configfs_attribute *nvmet_host_attrs[] = {
 static void nvmet_host_release(struct config_item *item)
 {
 	struct nvmet_host *host = to_host(item);
+
 #ifdef CONFIG_NVME_TARGET_AUTH
-	if (host->dhchap_secret)
 	kfree(host->dhchap_secret);
 #endif
 	kfree(host);