(subset) [PATCH] drm/vc4: Fix spelling mistake "mmaping" -> "mmapping"

[maxime at cerno.tech]

On Fri, 21 Oct 2022 09:40:35 +0100, Colin Ian King wrote:
> There are a couple of spelling mistakes in DRM_DEBUG messages. Fix them.
> 
> 

Applied to drm/drm-misc (drm-misc-next).

Thanks!
Maxime