ASoC: hdmi: Include of.h

of_match_ptr is defined in of.h. Include it explicitly.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/codecs/hdmi.c b/sound/soc/codecs/hdmi.c
index 9cb1c7d..1087fd5 100644
--- a/sound/soc/codecs/hdmi.c
+++ b/sound/soc/codecs/hdmi.c
@@ -20,6 +20,7 @@
  */
 #include <linux/module.h>
 #include <sound/soc.h>
+#include <linux/of.h>
 #include <linux/of_device.h>
 
 #define DRV_NAME "hdmi-audio-codec"