drm/panel: ilitek-ili9882t: fix unmet dependency for DRM_PANEL_ILITEK_ILI9882T

drm/panel: ilitek-ili9882t: fix unmet dependency for DRM_PANEL_ILITEK_ILI9882T

Currently, DRM_PANEL_ILITEK_ILI9882T selects DRM_DISPLAY_DSC_HELPER
without ensuring DRM_DISPLAY_HELPER is also enabled, causing an unmet
dependency and build failure.

Other similar options select DRM_DISPLAY_HELPER, let's do the same here.

This unmet dependency bug was found by kconfirm, a static analysis tool
for Kconfig.

Fixes: 68e28facbc8a ("drm/panel: ilitek-ili9882t: Select DRM_DISPLAY_DSC_HELPER")
Signed-off-by: Julian Braha <julianbraha@gmail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260712002632.2323484-1-julianbraha@gmail.com