[U-Boot] rockchip: rk3328: fix rockchip_get_cru api

[Philipp Tomsich]

> The API for get priv pointer is wrong, fix it.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
> 
>  arch/arm/mach-rockchip/rk3328/clk_rk3328.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Applied to u-boot-rockchip, thanks!