nvme-auth: use kvfree() for memory allocated with kvcalloc()

Memory allocated by kvcalloc() may come from vmalloc or kmalloc,
so use kvfree() instead of kfree() for proper deallocation.

Fixes: aa36d711e945 ("nvme-auth: convert dhchap_auth_list to an array")
Signed-off-by: Israel Rukshin <[e-mail]>
Reviewed-by: Max Gurtovoy <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Keith Busch <[e-mail]>

drivers/nvme/host/auth.c

···
 	if (ctrl->dhchap_ctxs) {
 		for (i = 0; i < ctrl_max_dhchaps(ctrl); i++)
 			nvme_auth_free_dhchap(&ctrl->dhchap_ctxs[i]);
-		kfree(ctrl->dhchap_ctxs);
+		kvfree(ctrl->dhchap_ctxs);
 	}
 	if (ctrl->host_key) {
 		nvme_auth_free_key(ctrl->host_key);