RK3399-T is down-clocked version of RK3399 SoC operated at 1.5GHz.

Add CPU operating points table for it.
Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Link: https://lore.kernel.org/r/20220902065057.97425-2-jagan@amarulasolutions.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>