[PATCH] drm/atomic: Drop helper include from drm_atomic.c

[Gustavo Padovan]

Hi Daniel,

2017-06-30 Daniel Vetter <daniel.vetter at ffwll.ch>:

> Core code should never have to look at helper stuff, to make sure that
> all helper code is 100% optional and can be overriden.
> 
> Cc: Gustavo Padovan <gustavo at padovan.org>
> Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Reviewed-by: Gustavo Padovan <gustavo.padovan at collabora.com>

Gustavo