drm/rcar-du: Adjust 14 checks for null pointers

[Dan Carpenter]

On Wed, Oct 25, 2017 at 08:44:38AM +0200, SF Markus Elfring wrote:
> >> The script “checkpatch.pl” pointed information out like the following.
> >>
> >> Comparison to NULL could be written !…
> >>
> >> Thus fix the affected source code places.
> >>
> > 
> > This one is fine
> 
> This kind of feedback is nice.
> 
> 
> > except for the commit message.
> 
> Would you like to support Unicode characters there?
> 

Multiple people have answered this question already and I have answered
it multiple times.

regards,
dan carpenter