OMAPDSS: hdmi: Add pdev pointer for audio_pdev in HDMI DRV data

This is used to store omap-hdmi-audio pdev for unregistering it.
Signed-off-by: NJyri Sarha <jsarha@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/omap2/dss/hdmi.h

@@ -353,6 +353,8 @@ struct omap_hdmi {
 	bool core_enabled;
 
 	struct omap_dss_device output;
+
+	struct platform_device *audio_pdev;
 };
 
 #endif