drm/msm/hdmi: drop empty 'none' regulator lists

drm/msm/hdmi: drop empty 'none' regulator lists

Several platform configs use empty 'none' regulator arrays. They are not
necessary, as the code will use corresponding _cnt field and skip the
array completely. Drop them now.

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/488861/
Link: https://lore.kernel.org/r/20220609122350.3157529-9-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>