nvmet-auth: replace pr_debug() with pr_err() to report an error.

In nvmet_auth_host_hash(), if a mismatch is detected in the hash length
the kernel should print an error.
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

drivers/nvme/target/auth.c

@@ -285,7 +285,7 @@ int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response,
 	}
 
 	if (shash_len != crypto_shash_digestsize(shash_tfm)) {
-		pr_debug("%s: hash len mismatch (len %d digest %d)\n",
+		pr_err("%s: hash len mismatch (len %d digest %d)\n",
 			__func__, shash_len,
 			crypto_shash_digestsize(shash_tfm));
 		ret = -EINVAL;