drm/doc: Add the "type" plane property to the list of properties

Matt aded this plane property before we had a table giving a summary of
the properties. Add it there.

Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl
index c526d81..7df3134 100644
--- a/Documentation/DocBook/drm.tmpl
+++ b/Documentation/DocBook/drm.tmpl
@@ -2502,7 +2502,7 @@
 	<td valign="top" >Description/Restrictions</td>
 	</tr>
 	<tr>
-	<td rowspan="19" valign="top" >DRM</td>
+	<td rowspan="20" valign="top" >DRM</td>
 	<td rowspan="2" valign="top" >Generic</td>
 	<td valign="top" >“EDID”</td>
 	<td valign="top" >BLOB | IMMUTABLE</td>
@@ -2518,6 +2518,14 @@
 	<td valign="top" >Contains DPMS operation mode value.</td>
 	</tr>
 	<tr>
+	<td rowspan="1" valign="top" >Plane</td>
+	<td valign="top" >“type”</td>
+	<td valign="top" >ENUM | IMMUTABLE</td>
+	<td valign="top" >{ "Overlay", "Primary", "Cursor" }</td>
+	<td valign="top" >Plane</td>
+	<td valign="top" >Plane type</td>
+	</tr>
+	<tr>
 	<td rowspan="2" valign="top" >DVI-I</td>
 	<td valign="top" >“subconnector”</td>
 	<td valign="top" >ENUM</td>