[U-Boot] [U-Boot, 1/1] video: rk3399_mipi: correct error checking

[Philipp Tomsich]

> Pointers are never negative. Use macro IS_ERR() for checking.
> cf. rk3288_mipi.c
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
>  drivers/video/rockchip/rk3399_mipi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Applied to u-boot-rockchip, thanks!