Documentation: Fix item list

@itemize @minus does not work as expected
(the items start with "* -").

A simple @itemize gives a better result.

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/qemu-doc.texi b/qemu-doc.texi
index fe84126..4d903f7 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -58,7 +58,7 @@
 
 QEMU has two operating modes:
 
-@itemize @minus
+@itemize
 
 @item
 Full system emulation. In this mode, QEMU emulates a full system (for