kernel/drm-ttm-helper: 6.12: fix missing dependency

Add missing depends kmod-drm-kms-helper.

Package kmod-drm-ttm-helper is missing dependencies for the following libraries:
drm_kms_helper.ko
fb_sys_fops.ko
syscopyarea.ko
sysfillrect.ko
sysimgblt.ko

Signed-off-by: Mieczyslaw Nalewaj <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/16547
Signed-off-by: Christian Marangi <[email protected]>

package/kernel/linux/modules/video.mk

@@ -389,7 +389,7 @@ define KernelPackage/drm-ttm-helper
   SUBMENU:=$(VIDEO_MENU)
   TITLE:=Helpers for ttm-based gem objects
   HIDDEN:=1
-  DEPENDS:=@DISPLAY_SUPPORT +kmod-drm-ttm
+  DEPENDS:=@DISPLAY_SUPPORT +kmod-drm-ttm +!LINUX_6_6:kmod-drm-kms-helper
   KCONFIG:=CONFIG_DRM_TTM_HELPER
   FILES:=$(LINUX_DIR)/drivers/gpu/drm/drm_ttm_helper.ko
   AUTOLOAD:=$(call AutoProbe,drm_ttm_helper)