[PATCH] drm/panel: ld9040: add backlight Kconfig dependency

[Sam Ravnborg]

On Mon, Jul 24, 2023 at 02:17:05PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd at arndb.de>
> 
> The driver now uses the backlight interface, which breaks when that
> is disabled:
> 
> ld.lld: error: undefined symbol: devm_backlight_device_register
> 
> Enforce the necessary Kconfig dependency to avoid this.
> 
> Fixes: c2268daa65fb4 ("drm/panel: ld9040: Register a backlight device")
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>
Reviewed-by: Sam Ravnborg <sam at ravnborg.org>

I expect that someone else with drm-misc rights apply the patch.

	Sam