meta-ibm: witherspoon-tacoma: Enable debug-trigger support

As for Rainier and Everest, use KCS2 as the debug-trigger interface.

Change-Id: I2614ffc3d97164658f2ad4fbb916cbf44be152e1
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/meta-ibm/conf/machine/witherspoon-tacoma.conf b/meta-ibm/conf/machine/witherspoon-tacoma.conf
index 2d696ec..7860e3e 100644
--- a/meta-ibm/conf/machine/witherspoon-tacoma.conf
+++ b/meta-ibm/conf/machine/witherspoon-tacoma.conf
@@ -39,3 +39,6 @@
 WKS_HOSTFW_SIZE = "4G"
 
 IMAGE_FEATURES_remove = "obmc-ikvm"
+
+DEBUG_TRIGGERS = "kcs2"
+PACKAGECONFIG_append_pn-debug-trigger = " triggers"