[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>

drivers/video/hdmi.c

@@ -842,7 +842,7 @@ hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
 		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";