Revert "drm: fix DRM_DISPLAY_DP_HELPER dependencies"

This reverts commit d1ef8fc1, as the
commit it fixes will be reverted, too.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patchwork.freedesktop.org/patch/msgid/df2876c72e82cbecfe8406fa058e8d3e895e4b93.1713780345.git.geert+renesas@glider.be


Signed-off-by: Maxime Ripard <mripard@kernel.org>