drm/panel: ld9040: reference spi_device_id table

Reference the spi_device_id table to silence W=1 warning:

  drivers/gpu/drm/panel/panel-samsung-ld9040.c:377:35:
    warning: ‘ld9040_ids’ defined but not used [-Wunused-const-variable=]

This also would be needed for matching the driver if booted without
CONFIG_OF (although it's not necessarily real case).
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210526123002.12913-1-krzysztof.kozlowski@canonical.com

drivers/gpu/drm/panel/panel-samsung-ld9040.c

@@ -383,6 +383,7 @@ MODULE_DEVICE_TABLE(spi, ld9040_ids);
 static struct spi_driver ld9040_driver = {
 	.probe = ld9040_probe,
 	.remove = ld9040_remove,
+	.id_table = ld9040_ids,
 	.driver = {
 		.name = "panel-samsung-ld9040",
 		.of_match_table = ld9040_of_match,