docs: Replace the block description list with references.

Match the listing in the Block Description subsection with the listing
in the original source, and use references to the sections instead of
using an auto generated table of contents.

Signed-off-by: Amr Gouhar <aagouhar@efabless.com>
Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
tree: b90a14cde00ffcb14deb8aa254d89990f37d9831
  1. .gitmodules
  2. LICENSE
  3. README.rst
  4. cells/
  5. docs/
  6. third_party/