mod mindpx v2 prototype and defconfig

Images/mindpx-v2.prototype

 {
     "board_id": 9, 
-    "magic": "PX4FWv1", 
+    "magic": "PX4FWv2",
     "description": "Firmware for the MindPx-V2  board", 
     "image": "", 
     "build_time": 0, 

nuttx-configs/mindpx-v2/nsh/defconfig

@@ -667,9 +667,9 @@ CONFIG_CDCACM_BULKIN_REQLEN=96
 CONFIG_CDCACM_RXBUFSIZE=1000
 CONFIG_CDCACM_TXBUFSIZE=8000
 CONFIG_CDCACM_VENDORID=0x26ac
-CONFIG_CDCACM_PRODUCTID=0x0011
+CONFIG_CDCACM_PRODUCTID=0x0030
 CONFIG_CDCACM_VENDORSTR="3D Robotics"
-CONFIG_CDCACM_PRODUCTSTR="PX4 FMU v2.x"
+CONFIG_CDCACM_PRODUCTSTR="MindPX BL v2.x"
 # CONFIG_USBMSC is not set
 # CONFIG_USBHOST is not set
 # CONFIG_WIRELESS is not set