[media] s5p-mfc: Adjust a null pointer check in four functions

[SF Markus Elfring]

>> * Do you care to preserve an information like the author date?
>
> In this case not, but actually the Date line is not an issue.

Thanks for your information.

It seems then that you quoted a line too much.


> Anyway the patch is malformed, …

I have got doubts for this view because the file was automatically generated
by the command “git format-patch” also for the discussed three update steps.

Regards,
Markus