drm/mode: document path property and function to set it. (v1.1)

These two didn't get documented properly, do so.

Pointed out by Daniel.

v1.1: add missing boilerplate (Daniel)

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl
index 64d9c1e..b4d80a2 100644
--- a/Documentation/DocBook/drm.tmpl
+++ b/Documentation/DocBook/drm.tmpl
@@ -2534,7 +2534,7 @@
 	</tr>
 	<tr>
 	<td rowspan="21" valign="top" >DRM</td>
-	<td rowspan="2" valign="top" >Generic</td>
+	<td rowspan="3" valign="top" >Generic</td>
 	<td valign="top" >“EDID”</td>
 	<td valign="top" >BLOB | IMMUTABLE</td>
 	<td valign="top" >0</td>
@@ -2549,6 +2549,13 @@
 	<td valign="top" >Contains DPMS operation mode value.</td>
 	</tr>
 	<tr>
+	<td valign="top" >“PATH”</td>
+	<td valign="top" >BLOB | IMMUTABLE</td>
+	<td valign="top" >0</td>
+	<td valign="top" >Connector</td>
+	<td valign="top" >Contains topology path to a connector.</td>
+	</tr>
+	<tr>
 	<td rowspan="1" valign="top" >Plane</td>
 	<td valign="top" >“type”</td>
 	<td valign="top" >ENUM | IMMUTABLE</td>