[PATCH] drm: fix oops in drm_atomic_set_crtc_for_connector

[Sam Ravnborg]

On Sun, Nov 15, 2020 at 03:39:07PM +0000, Simon Ser wrote:
> crtc can be NULL. connector, extracted from conn_state, can't.
> 
> Fixes: e3aae683e861 ("drm: convert drm_atomic_uapi.c to new debug helpers")
> Signed-off-by: Simon Ser <contact at emersion.fr>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Sam Ravnborg <sam at ravnborg.org>

Reviewed-by: Sam Ravnborg <sam at ravnborg.org>