arm: mx6: tqma6: Add WRU-IV baseboard for the TQMa6 SoM

This patch adds support for the "OHB System AG" baseboard
with is equipped with the TQMa6S SoM.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Markus Niebel <Markus.Niebel@tq-group.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/include/configs/tqma6.h b/include/configs/tqma6.h
index bd93ec7..f7fade1 100644
--- a/include/configs/tqma6.h
+++ b/include/configs/tqma6.h
@@ -389,6 +389,8 @@
  */
 #ifdef CONFIG_MBA6
 #include "tqma6_mba6.h"
+#elif CONFIG_WRU4
+#include "tqma6_wru4.h"
 #else
 #error "No baseboard for the TQMa6 defined!"
 #endif