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/board/tqc/tqma6/Kconfig b/board/tqc/tqma6/Kconfig
index b56237d..dbd8787 100644
--- a/board/tqc/tqma6/Kconfig
+++ b/board/tqc/tqma6/Kconfig
@@ -64,6 +64,11 @@
 	  Select the MBa6 starterkit. This features a GigE Phy, USB, SD-Card
 	  etc.
 
+config WRU4
+	bool "OHB WRU-IV"
+	help
+	  Select the OHB Systems AG WRU-IV baseboard.
+
 endchoice
 
 config IMX_CONFIG