drm/mediatek: mtk_hdmi: Remove driver bound to HDMI print

Remove the "driver bound to HDMI" print to avoid useless spam in
the kernel log, as registered and bound drivers can be debugged
through debugfs.

Reviewed-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20250217154836.108895-33-angelogioacchino.delregno@collabora.com/


Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>