[PATCH] drm: add modifiers for Apple twiddled layouts

[Alyssa Rosenzweig]

> > +/*
> > + * Apple twiddled and compressed layout.
> > + *
> > + * This is the main lossless image compression layout supported by Apple GPUs.
> > + *
> > + * The image is divided into tiles that are internally twiddled.  In addition to
> 
> Does the compressed format uses the same the sime tile sizes (in pixel
> dimensions) and layout as DRM_FORMAT_MOD_APPLE_TWIDDLED? I'd assume so
> but I think it's worth stating explictly.

It does. I'll reword to make that more clear.