drm: zte: remove leftover 'inf' from struct zx_hdmi

There is a leftover 'inf' field in struct zx_hdmi from commit
'831a8d5e ("drm: zte: move struct vou_inf into zx_vou driver")'.
Remove it.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Reviewed-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1490086795-17925-1-git-send-email-shawnguo@kernel.org

drivers/gpu/drm/zte/zx_hdmi.c

@@ -50,7 +50,6 @@ struct zx_hdmi {
 	struct clk *xclk;
 	bool sink_is_hdmi;
 	bool sink_has_audio;
-	const struct vou_inf *inf;
 	struct platform_device *audio_pdev;
 };