[U-Boot] rockchip: rk3399: init CPU clock when rkclk_init()

[Philipp Tomsich]

> Init the CPU and its buses to speed up the boot time.
> Move rkclk_init() to a place after rk3399_configure_cpu has defined
> at the same time, or else there will be a warning.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> ---
> 
>  drivers/clk/rockchip/clk_rk3399.c | 157 +++++++++++++++++++-------------------
>  1 file changed, 79 insertions(+), 78 deletions(-)
> 

Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>