Update to reflect the fact that AC97 will be built by default

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6259 c046a42c-6fe2-441c-8c8c-71466251a162

qemu-doc.texi

@@ -184,8 +184,8 @@ PCI UHCI USB controller and a virtual USB hub.
 
 SMP is supported with up to 255 CPUs.
 
-Note that adlib, ac97, gus and cs4231a are only available when QEMU
-was configured with --audio-card-list option containing the name(s) of
+Note that adlib, gus and cs4231a are only available when QEMU was
+configured with --audio-card-list option containing the name(s) of
 required card(s).
 
 QEMU uses the PC BIOS from the Bochs project and the Plex86/Bochs LGPL