imx_sdp: use do_response in jump
imx_sdp: use do_response in jump

This allows for better/more consistent debug output and better
error handling. The utility will now print an error in case
jumping fails.

Signed-off-by: Stefan Agner <8bf81831f67286fff829779134e88c94b37210a1@toradex.com>

bwalle/imx_usb_loader,boundarydevices/imx_usb_loader