Continue updating the NOR flash coverage to use @deffn syntax, so the
commands have more consistent presentation and formatting.  This
reorganizes information and updates its presentation, except where
the information didn't really match the code.

This patch updates the main commands, and finishes making the section
structure parallel the NAND presentation.  Of note:

 - The "flash fill[whb] addr value length" commands are now documented.

 - The "flash bank" command is now presented much earlier

 - Explicit mention is made that NOR flash should be read using just
   standard memory access commands, like "mdw" and "dump_image".



git-svn-id: svn://svn.berlios.de/openocd/trunk@1938 b42882b7-edfa-0310-969c-e2dbd0fdcd60