hikey: BoardConfig.mk: Set command line properly for abootimg support
am: 272d1568b5

* commit '272d1568b5f5b9fca19c4e4709a1797700e1680f':
  hikey: BoardConfig.mk: Set command line properly for abootimg support

Change-Id: Ie0dfb5523a10361ac3f4a6d26c22e874818b681c