bbctl: use default USB timeout and remove sleep between transfers
bbctl: use default USB timeout and remove sleep between transfers

Signed-off-by: Jeppe Ledet-Pedersen <15dc315eb688d5391231b93ed828e3333b4726fa@satlab.org>

satlab/bbctl,aausat/bbctl,satlab/bbctl,satlab/bbctl,aausat/bbctl,satlab/bbctl