nvme-fabrics: remove superfluous nvmf_host_put in nvmf_parse_options

Opts->host is NULL there. It is checked just before. So remove
nvmf_host_put. It is introduced by commit 59a2f3f0 ("nvme: fix
potential memory leak in option parsing").
Signed-off-by: Hou Pu <houpu.main@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/host/fabrics.c

@@ -719,7 +719,6 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
 				ret = -EINVAL;
 				goto out;
 			}
-			nvmf_host_put(opts->host);
 			opts->host = nvmf_host_add(p);
 			kfree(p);
 			if (!opts->host) {