Platforms/ARM: synchronize ArmJuno.fdf with edk2
Platforms/ARM: synchronize ArmJuno.fdf with edk2

Synchronize with svn: r17968

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Leif Lindholm <a613079f0455438b29e28a9c5b9eb3779a81a33a@linaro.org>

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