Add flash method "none"
drebrez@drebrez-laptop:~/pmbootstrap$ pmbootstrap flasher boot
[20:16:30] This device doesn't support any flash method.
[20:16:30] Done
drebrez@drebrez-laptop:~/pmbootstrap$ pmbootstrap flasher flash_kernel
[20:16:34] This device doesn't support any flash method.
[20:16:34] Done
drebrez@drebrez-laptop:~/pmbootstrap$ pmbootstrap flasher flash_system
[20:16:37] This device doesn't support any flash method.
[20:16:37] Done
All the other pmbootstrap flasher
actions still works as normal
Close: #929 (closed)
(ps: adding the sp-flash-tool
method is taking more time, because of symlinks/scatter file/..., hence it will be in another PR)