doc: _extensions: zephyr: Use binding title in supported hw table

Use the title property from bindings in the supported hardware table
if available.

Create <abbr> elements for acronyms and abbreviations in titles.
Abbreviations are not created when the description field is used as
a title, since existing text in bindings was not created with this
in mind, and parentheses are used in the text in ways that are
incompatible with the auto-abbreviating logic.

Signed-off-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>