adding C-c C-f C-p shortcut for \textipa

[Roger Levy <sinoslav@gmail.com>]

I am a linguist who uses AucTeX and I would like to add a key binding
for C-c C-f C-p that behaves exactly like other C-c C-f * commands
(e.g., C-c C-f C-e for \emph), but introduces the textfont \textipa
(for the International Phonetic Alphabet).  How would I do this?  It
looks to me like I need to customize TeX-font-list but I'm not sure
the best way to do it (I'd prefer to doing this in my .emacs file
directly to using Emacs customization menus).

Many thanks,

Roger Levy