drm/atomic-helper: print message on driver connector check failure
Sometimes drivers are missing logs when they return EINVAL.
Printing the failure here in common code can help understand where
EINVAL is coming from.
All other atomic_check() calls in this file already have similar
logging.
v2: add missing newlines
Signed-off-by: Simon Ser <contact@emersion.fr>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220829151451.152114-1-contact@emersion.fr