drm: panel-lvds: Spout an error if of_get_display_timing() gives an error

In the patch ("video: of: display_timing: Don't yell if no timing node
is present") we'll stop spouting an error directly in
of_get_display_timing() if no node is present.  Presumably panel-lvds
should take charge of spouting its own error now.

NOTE: we'll print two errors if the node was present but there were
problems parsing the timing node (one in of_parse_display_timing() and
this new one).  Since this is a fatal error for the driver's probe
(and presumably someone will be debugging), this should be OK.

Signed-off-by: Douglas Anderson <[email protected]>
Reviewed-by: Sam Ravnborg <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Philipp Zabel <[email protected]>
Cc: Tomi Valkeinen <[email protected]>
Cc: Laurent Pinchart <[email protected]>
Cc: Russell King <[email protected]>
Cc: Daniel Vetter <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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