clk: rockchip: add the new clock ids for RK3228 VOP

There are four clocks that vop module would need to operate:
    DCLK_VOP,  HCLK_VOP,  SCLK_VOP,  ACLK_VOP,

Signed-off-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>