[media] hdmi: rename HDMI_AUDIO_CODING_TYPE_EXT_STREAM to _EXT_CT

As per the suggestion of Thierry Reding rename
HDMI_AUDIO_CODING_TYPE_EXT_STREAM to HDMI_AUDIO_CODING_TYPE_EXT_CT to
be consistent with the CEA-861 spec.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
index a7c6ae4..1626892 100644
--- a/drivers/video/hdmi.c
+++ b/drivers/video/hdmi.c
@@ -842,7 +842,7 @@
 		return "Invalid";
 
 	switch (ctx) {
-	case HDMI_AUDIO_CODING_TYPE_EXT_STREAM:
+	case HDMI_AUDIO_CODING_TYPE_EXT_CT:
 		return "Refer to CT";
 	case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
 		return "HE AAC";
diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
index 2ff3431..e974420 100644
--- a/include/linux/hdmi.h
+++ b/include/linux/hdmi.h
@@ -230,7 +230,8 @@
 };
 
 enum hdmi_audio_coding_type_ext {
-	HDMI_AUDIO_CODING_TYPE_EXT_STREAM,
+	/* Refer to Audio Coding Type (CT) field in Data Byte 1 */
+	HDMI_AUDIO_CODING_TYPE_EXT_CT,
 
 	/*
 	 * The next three CXT values are defined in CEA-861-E only.