kernel: kmod-drm-imx-hdmi: Fix kmod-drm-display-helper dependency

Select the kmod-drm-display-helper package instead of depending on it.
kmod-drm-display-helper is hidden now, so the user can not manually
select it.

This fixes the build of the imx target.

Fixes: 8bcc6d1894eb ("kernel: kmod-drm-display-helper: Mark hidden")
Link: https://github.com/openwrt/openwrt/pull/19532
Signed-off-by: Hauke Mehrtens <[email protected]>

package/kernel/linux/modules/video.mk

@@ -585,7 +585,7 @@ $(eval $(call KernelPackage,drm-imx))
 define KernelPackage/drm-imx-hdmi
   SUBMENU:=$(VIDEO_MENU)
   TITLE:=Freescale i.MX HDMI DRM support
-  DEPENDS:=+kmod-sound-core kmod-drm-imx kmod-drm-display-helper
+  DEPENDS:=+kmod-sound-core kmod-drm-imx +kmod-drm-display-helper
   KCONFIG:=CONFIG_DRM_IMX_HDMI \
 	CONFIG_DRM_DW_HDMI_AHB_AUDIO \
 	CONFIG_DRM_DW_HDMI_I2S_AUDIO