lava_dispatcher/actions/boot/pyocd: use '--uid' for 'pyocd flash'
--uid should be used with pyocd flash for connecting to
a specific board. pyocd flash --board doesn't work for
selecting board, and the option has been removed since
version v0.32.0.
--board should be used for pyocd-flashtool as --uid
isn't availabe for pyocd-flashtool.
Signed-off-by: Chase Qi chase.qi@linaro.org