drm/msm/dp: drop obsolete audio headers access through catalog

drm/msm/dp: drop obsolete audio headers access through catalog

Drop obsolete functions to access audio packet headers. The dp_audio.c
now writes them using msm_dp_write_link() directly.

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>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/629052/
Link: https://lore.kernel.org/r/20241216-fd-dp-audio-fixup-v4-3-f8d1961cf22f@linaro.org