board_status/towiki: Fix link to last report for "clone" boards

I noticed that the "last known good" field for the ThinkPad R400 pointed
nowhere. Instead of

	https://www.coreboot.org/Supported_Motherboards#lenovo.2Ft400

it pointed to

	https://www.coreboot.org/Supported_Motherboards#lenovo.2Fr400

which does not exist because if a board is marked as a "Clone of"
another one in board_info.txt, towiki uses the original board's reports
to derive the "last known good" date and color.

Change-Id: Ie235ca8e8691f49d041de7c5770eae77cdd444a7
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/21906
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/board_status/to-wiki/towiki.sh

@@ -434,7 +434,7 @@ EOF
 				lastgood_diff_hex="0${lastgood_diff_hex}"
 			fi
 			cell_bgcolor="#${lastgood_diff_hex}ff00"
-			echo "| style=\"background:${cell_bgcolor}\" | [[#$vendor/$board|$lastgood]]"
+			echo "| style=\"background:${cell_bgcolor}\" | [[#$venboard|$lastgood]]"
 		fi
 
 		echo "| $northbridge_nice"