arm64: dts: rockchip: add efuse for RK3368 SoCs

This adds the definition for eFuse that is found on RK3368 SoCs with the
corresponding data cells.

Signed-off-by: Romain Perier <romain.perier@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>