Fix USB buffer size, by Herbert Xu.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2328 c046a42c-6fe2-441c-8c8c-71466251a162

hw/usb-uhci.c

@@ -87,7 +87,7 @@ typedef struct UHCIState {
        is to allow multiple pending requests.  */
     uint32_t async_qh;
     USBPacket usb_packet;
-    uint8_t usb_buf[1280];
+    uint8_t usb_buf[2048];
 } UHCIState;
 
 typedef struct UHCI_TD {