[U-Boot] rockchip: video: mipi: Fix phy frequency setting

[Philipp Tomsich]

> There was an incorrect check when looping and finding the first
> fast enough frequency in the freq_rang table. The code did
> actually return the first that was either exactly correct or
> too slow.
> 
> Signed-off-by: Richard Röjfors <richard at puffinpack.se>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
>  drivers/video/rockchip/rk_mipi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Applied to u-boot-rockchip, thanks!