clk: rockchip: add dt-binding header for rk3568

Add the dt-bindings header for the rk3568, that gets shared between
the clock controller and the clock references in the dts.
Add softreset ID for rk3568.
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20210315085608.16010-3-zhangqing@rock-chips.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>