firmware, host: Changed vendor and product id

The code used a vendor and product id taken from Atmel example code.
Now it is changed to the vendor and product id, which was also previously
used in the original SIMtrace code.
diff --git a/usb_application/simtrace.py b/usb_application/simtrace.py
index 4b8f3c7..4934958 100755
--- a/usb_application/simtrace.py
+++ b/usb_application/simtrace.py
@@ -39,7 +39,7 @@
         return False
 
 def find_dev():
-    dev = usb.core.find(idVendor=0x03eb, idProduct=0x6004)
+    dev = usb.core.find(idVendor=0x16c0, idProduct=0x0762)
     if dev is None:
         raise ValueError("Device not found")
     else: