Add OpenFSI flag to device tree config file

Change-Id: I843b15b07b7c56fbda1b8d9e9b7dbbac6835f5de
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/workbook/devtree-config/config.yaml b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/workbook/devtree-config/config.yaml
index 3c21ad3..3094c16 100644
--- a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/workbook/devtree-config/config.yaml
+++ b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-phosphor/workbook/devtree-config/config.yaml
@@ -48,3 +48,7 @@
      DTSI_INCLUDE: aspeed-bmc-opp-flash-layout.dtsi
   chip-select-1:
     label: alt
+
+#If OpenFSI device tree support should be enabled.
+#true or false
+enable-openfsi: true