gas: bfin: convert to new doc style

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

gas/doc/c-bfin.texi

@@ -2,11 +2,14 @@
 @c Free Software Foundation, Inc.
 @c This is part of the GAS manual.
 @c For copying conditions, see the file as.texinfo.
+@c man end
+
 @ifset GENERIC
 @page
 @node Blackfin-Dependent
 @chapter Blackfin Dependent Features
 @end ifset
+
 @ifclear GENERIC
 @node Machine Dependencies
 @chapter Blackfin Dependent Features
@@ -24,7 +27,8 @@
 @cindex Blackfin options (none)
 @cindex options for Blackfin (none)
 
-@table @code
+@c man begin OPTIONS
+@table @gcctabopt
 
 @cindex @code{-mcpu=} command line option, Blackfin
 @item -mcpu=@var{processor}@r{[}-@var{sirevision}@r{]}
@@ -79,6 +83,7 @@ Assemble for the FDPIC ABI.
 @itemx -mnopic
 Disable -mfdpic.
 @end table
+@c man end
 
 @node Blackfin Syntax
 @section Syntax