usb: change VID/PID for usb-hub and usb-msd to prevent conflict

Some USB drivers, for example USBASPI.SYS, will skip different type of
device which has same VID/PID. The following patch helps preventing
usb-msd being skipped by the driver.

Signed-off-by: Roy Tam <roytam@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

hw/usb-hub.c

@@ -127,8 +127,8 @@ static const USBDescDevice desc_device_hub = {
 
 static const USBDesc desc_hub = {
     .id = {
-        .idVendor          = 0,
-        .idProduct         = 0,
+        .idVendor          = 0x0409,
+        .idProduct         = 0x55aa,
         .bcdDevice         = 0x0101,
         .iManufacturer     = STR_MANUFACTURER,
         .iProduct          = STR_PRODUCT,

hw/usb-msd.c

@@ -162,8 +162,8 @@ static const USBDescDevice desc_device_high = {
 
 static const USBDesc desc = {
     .id = {
-        .idVendor          = 0,
-        .idProduct         = 0,
+        .idVendor          = 0x46f4, /* CRC16() of "QEMU" */
+        .idProduct         = 0x0001,
         .bcdDevice         = 0,
         .iManufacturer     = STR_MANUFACTURER,
         .iProduct          = STR_PRODUCT,