Not an exact match, but similar:

Beaufort
http://new.myfonts.com/search/beaufort/fonts/

Also in the ballpark...

http://new.myfonts.com/fonts/nicksfonts/seta-reta-nf/regular/characters....

Try TF Arrow.

FWIW I think the logo font itself is custom. The new CS logo was designed in 2005 by The Brand Union, who on its website refers to the «hand-crafted typeface» in the logo* which I assume means custom.
* http://www.thebrandunion.com/OurWork/Client/CreditSuisse/85/CaseStudy/81...