nvme: update the multipath warning in nvme_init_ns_head

The new NVME_MULTIPATH_PARAM config option requires updates
to the warning message in nvme_init_ns_head().

Signed-off-by: John Meneghini <jmeneghi@redhat.com>
Tested-by: John Meneghini <jmeneghi@redhat.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

drivers/nvme/host/core.c

@@ -3822,7 +3822,7 @@ static int nvme_init_ns_head(struct nvme_ns *ns, struct nvme_ns_info *info)
 				"Found shared namespace %d, but multipathing not supported.\n",
 				info->nsid);
 			dev_warn_once(ctrl->device,
-				"Support for shared namespaces without CONFIG_NVME_MULTIPATH is deprecated and will be removed in Linux 6.0.\n");
+				"Shared namespace support requires core_nvme.multipath=Y.\n");
 		}
 	}