[U-Boot] [U-Boot, 2/2] video: rk3399_mipi: Combine NULL check into IS_ERR_OR_NULL()

[Philipp Tomsich]

> Signed-off-by: Punit Agrawal <punit.agrawal at arm.com>
> 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!