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 <[e-mail]>
Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Sagi Grimberg <[e-mail]>
Reviewed-by: Chaitanya Kulkarni <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/nvme/target/configfs.c

···
 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);
+	kfree(host->dhchap_secret);
 #endif
 	kfree(host);
 }