Make KMS set_resource function return TRUE

This is what's expected by the server, and allows the EDID for example
to be exported in the KMS case.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

src/drmmode_display.c

@@ -892,8 +892,8 @@ drmmode_output_set_property(xf86OutputPtr output, Atom property,
 	    }
 	}
     }
-    /* no property found? */
-    return FALSE;
+
+    return TRUE;
 }
 
 static const xf86OutputFuncsRec drmmode_output_funcs = {