servo: Require usbkm232 for buddy

Require usbkm232 for buddy

BUG=None
TEST=manual
1.export USBKM232_UART_DEVICE = /dev/ttyUSB0
2.sudo servod --board=buddy --usbkm232=$USBKM232_UART_DEVICE
3.there is no error messages
Signed-off-by: Peggy Chuang<PeggyChuang@ami.com.tw>
Change-Id: I41e889781c7e14a1653659439409e185b95fa7d3
Reviewed-on: https://chromium-review.googlesource.com/291550
Reviewed-by: Shawn N <shawnn@chromium.org>
diff --git a/servo/servo_server.py b/servo/servo_server.py
index 1ff11fe..b0ba2ab 100755
--- a/servo/servo_server.py
+++ b/servo/servo_server.py
@@ -132,7 +132,7 @@
       return keyboard_handlers.ParrotHandler(servo)
     elif board == 'stout':
       return keyboard_handlers.StoutHandler(servo)
-    elif board in ('cranky', 'guado', 'jecht', 'mccloud', 'monroe',
+    elif board in ('buddy', 'cranky', 'guado', 'jecht', 'mccloud', 'monroe',
                    'ninja', 'nyan_kitty', 'panther', 'rikku', 'stumpy',
                    'sumo', 'tidus', 'tricky', 'zako'):
       if self._usbkm232 is None: