arm64: dts: rockchip: Add SFC to RK3308

Add a devicetree entry for the Rockchip SFC for the RK3308 SOC.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Link: https://lore.kernel.org/r/20210812134639.31586-1-jon.lin@rock-chips.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>