scripts/dfuutil: add support for DfuSe devices Add DFUUTIL_DFUSE_ADDR to the list of dfu-util environment variables, which can be used to flash DfuSe devices (e.g. STM32 based MCUs). Change-Id: I39fdc338f7f034376ce50b648b06f39fee3169a7 Signed-off-by: Ricardo Salveti <ricardo.salveti@linaro.org>