drm/ci: Enable CONFIG_BACKLIGHT_CLASS_DEVICE

Dependency for CONFIG_DRM_PANEL_EDP.  Missing this was causing the drm
driver to not probe on devices that use panel-edp.

Signed-off-by: Rob Clark <[email protected]>
Tested-by: Helen Koike <[email protected]>
Acked-by: Helen Koike <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Maxime Ripard <[email protected]>

Author: robclark

drivers/gpu/drm/ci/arm.config

@@ -24,6 +24,7 @@ CONFIG_DRM_LIMA=y
 CONFIG_DRM_PANEL_SIMPLE=y
 CONFIG_PWM_CROS_EC=y
 CONFIG_BACKLIGHT_PWM=y
+CONFIG_BACKLIGHT_CLASS_DEVICE=y
 
 CONFIG_ROCKCHIP_CDN_DP=n
 

drivers/gpu/drm/ci/arm64.config

@@ -26,6 +26,7 @@ CONFIG_DRM_ETNAVIV=y
 CONFIG_DRM_I2C_ADV7511=y
 CONFIG_PWM_CROS_EC=y
 CONFIG_BACKLIGHT_PWM=y
+CONFIG_BACKLIGHT_CLASS_DEVICE=y
 
 CONFIG_ROCKCHIP_CDN_DP=n