disasm: update comment

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/disas.c b/disas.c
index 1334b8e..611b30b 100644
--- a/disas.c
+++ b/disas.c
@@ -137,7 +137,7 @@
 
 /* Disassemble this for me please... (debugging). 'flags' has the following
    values:
-    i386 - nonzero means 16 bit code
+    i386 - 1 means 16 bit code, 2 means 64 bit code
     arm  - nonzero means thumb code
     ppc  - nonzero means little endian
     other targets - unused