Fix make pdfdocs

Hi, Im actually resubmitting a patch I dug up in the archives from David Gomez back in October to fix a problem when creating the deviceiobook.pdf file.

Details and patch below.

Jason

i, this patch fix an error when generating postscript files. Error is caused by the absence of documentation in include/asm/io.h.

@@ -224,9 +224,5 @@
 
   </chapter>
 
-  <chapter id="pubfunctions">
-     <title>Public Functions Provided</title>
-  !Einclude/asm-i386/io.h
-  </chapter>
 
 </book>

David Gómez

"The question of whether computers can think is just like the question of
whether submarines can swim." -- Edsger W. Dijkstra