[V3] amdgpu: remove unnecessary condition check

[Markus Elfring]

>> But i have to say there are so many code not follow the kernel code-style in amdgpu module.
>> And also the ./scripts/checkpatch.pl did not throw any warning or error.
>
> That is unfortunately true, yes. But we try to push new code through the usual code review and improve things as we go.
>
> On the other hand patches just to fix the coding style are usually seen as an unnecessary interruption and just a waste of time.

Would you become interested in adjusting deviations from known programming guidelines
in an automatic way with the help of corresponding advanced development tools?

Regards,
Markus