Don't run if machine is 'none'
machine == 'none' should avoid a flash-kernel run and simply exit early with exit status 0. Currently that's only the case if the env variable FK_MACHINE is set to 'none' but not for any of the other possible ways to specify the machine.
Specifically, setting it in /etc/flash-kernel/machine results in a failure contrary to what the man page says.
Signed-off-by: Juerg Haefliger juergh@proton.me
Edited by Juerg Haefliger