[PATCH v2] efi/libstub/arm*: Set default address and size cells values for an empty dtb

AKASHI Takahiro wrote:

Since the values of *-cells under root node should reflect the hardware,
the kernel has no way to determine whether they be 1 or 2 here.

It's safe to set the *-cells to 2 on all platforms, as long as everyone who 
reads/writes from/to the device tree respects those values (which is what 
they're supposed to do anyway).

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