stmhal: Update boot.py files to use VCP instead of CDC.

examples/SDdatalogger/boot.py

@@ -16,10 +16,10 @@ pyb.LED(3).off()                # indicate that we finished waiting for the swit
 pyb.LED(4).on()                 # indicate that we are selecting the mode
 
 if switch_value:
-    pyb.usb_mode('CDC+MSC')
+    pyb.usb_mode('VCP+MSC')
     pyb.main('cardreader.py')           # if switch was pressed, run this
 else:
-    pyb.usb_mode('CDC+HID')
+    pyb.usb_mode('VCP+HID')
     pyb.main('datalogger.py')           # if switch wasn't pressed, run this
 
 pyb.LED(4).off()                # indicate that we finished selecting the mode

stmhal/main.c

@@ -137,8 +137,8 @@ static const char fresh_boot_py[] =
 "import machine\r\n"
 "import pyb\r\n"
 "#pyb.main('main.py') # main script to run after this one\r\n"
-"#pyb.usb_mode('CDC+MSC') # act as a serial and a storage device\r\n"
-"#pyb.usb_mode('CDC+HID') # act as a serial device and a mouse\r\n"
+"#pyb.usb_mode('VCP+MSC') # act as a serial and a storage device\r\n"
+"#pyb.usb_mode('VCP+HID') # act as a serial device and a mouse\r\n"
 ;
 
 static const char fresh_main_py[] =