drm/msm/dp: drop the msm_dp_catalog module

Now as the msm_dp_catalog module became nearly empty, drop it, accessing
registers directly from the corresponding submodules.

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org> # sc7180-trogdor
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/654332/
Link: https://lore.kernel.org/r/20250518-fd-dp-audio-fixup-v6-11-2f0ec3ec000d@oss.qualcomm.com