Many boards use a USB vendor id of 0x4321. This doesn't exist and
shouldn't be used. Remove this and also the bogus product id of 0x1234.
The boards will use the barebox default vendor/product id then.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

enable serial and dfu at the same time

senario if the usb device is plugged and the BP is not pressed at boot time
during 5s the usbserial will be enable

disable zlib support to fit in the 256K

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

detect it at boot time

if the user button is pressed 5s and the vbus is 1 start the dfu

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>