Fixed out of sync definitions for set_frequency_registers() and scale_uint32()
atcommander: able to force out of bootloader mode

The radio occasionally gets stuck in bootloader mode. This patch replicates
a solution from ardupilot (libraries/GCS_MAVLink/GCS_Common.cpp) to unstick
the radio. The solution is incorporated into the --force option, making it
more assertive than before.

This patch also slightly adjusts some of the radio response timeouts.