mlxsw: core: use PSID string define in devlink info

Instead of having the string spelled out in the driver, use the global
define with the same value.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlxsw/core.c

@@ -1444,7 +1444,9 @@ mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 	if (err)
 		return err;
 
-	err = devlink_info_version_fixed_put(req, "fw.psid", fw_info_psid);
+	err = devlink_info_version_fixed_put(req,
+					     DEVLINK_INFO_VERSION_GENERIC_FW_PSID,
+					     fw_info_psid);
 	if (err)
 		return err;