* changes:
  fix(plat/marvell/a3k): Fix building uart-images.tgz.bin archive
  refactor(plat/marvell/a3k): Rename *_CFG and *_SIG variables
  refactor(plat/marvell/a3k): Rename DOIMAGETOOL to TBB
  refactor(plat/marvell/a3k): Remove useless DOIMAGEPATH variable
  fix(plat/marvell/a3k): Fix check for external dependences
  fix(plat/marvell/a8k): Add missing build dependency for BLE target
  fix(plat/marvell/a8k): Correctly set include directories for individual targets
  fix(plat/marvell/a8k): Require that MV_DDR_PATH is correctly set