cbfs: Add docbook template

This adds a docbook template for fs, and makes CBFS use it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/doc/DocBook/Makefile b/doc/DocBook/Makefile
index da88b32..521e8bc 100644
--- a/doc/DocBook/Makefile
+++ b/doc/DocBook/Makefile
@@ -8,7 +8,7 @@
 
 include $(TOPDIR)/config.mk
 
-DOCBOOKS := linker_lists.xml stdio.xml
+DOCBOOKS := fs.xml linker_lists.xml stdio.xml
 
 ###
 # The build process is as follows (targets):