drm/panel: fix Visionox RM692E5 dependencies

The newly added driver uses the DSC helpers, so the corresponding
Kconfig option must be enabled:

ERROR: modpost: "drm_dsc_pps_payload_pack" [drivers/gpu/drm/panel/panel-visionox-rm692e5.ko] undefined!

Fixes: 7cb3274 ("drm/panel: Add Visionox RM692E5 panel driver")
Signed-off-by: Arnd Bergmann <[email protected]>
Reviewed-by: Neil Armstrong <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Neil Armstrong <[email protected]>

Author: arndb

drivers/gpu/drm/panel/Kconfig

@@ -1020,6 +1020,8 @@ config DRM_PANEL_VISIONOX_RM692E5
 	depends on OF
 	depends on DRM_MIPI_DSI
 	depends on BACKLIGHT_CLASS_DEVICE
+	select DRM_DISPLAY_DSC_HELPER
+	select DRM_DISPLAY_HELPER
 	help
 	  Say Y here if you want to enable support for Visionox RM692E5 amoled
 	  display panels, such as the one found in the Nothing Phone (1)