Replace userfastboot with efi-fastboot

o Minnowboard flash now uses fastboot-over-tcp implementation
  in kernelflinger.
o Userfastboot is removed.
o Add fastboot option in kernelflinger manifest for
  boot option in UEFI BIOS at OS flash time.

BUG=none
Change-Id: Ib4a3d108c76e6e6a89b555ef62eeb90afed85ae5
Tracked-On: https://jira01.devtools.intel.com/browse/BP-267
Signed-off-by: Viorel Suman <[email protected]>
Signed-off-by: Bruce Beare <[email protected]>
11 files changed