[PATCH] modesetting: Support native primary plane rotation

[Mark Kettenis]

> From: Chris Wilson <chris at chris-wilson.co.uk>
> Date: Wed,  9 Jul 2014 12:14:41 +0100
> 
> With the advent of universal drm planes and the introduction of generic
> plane properties for rotations, we can query and program the hardware
> for native rotation support.
> 
> NOTE: this depends upon the next release of libdrm to remove one
> opencoded define.
> 
> v2: Use enum to determine primary plane, suggested by Pekka Paalanen.
>     Use libobj for replacement ffs(), suggested by walter harms
> v3: Support combinations of rotations and reflections
>     Eliminate use of ffs() and so remove need for libobj

Surely that means...
>  
> +#ifndef HAVE_FFS
> +extern int ffs(unsigned int value);
> +#endif

This bit should be removed ad well?