devicetree: support of 64-bit addresses from devicetree

Usage of 64-bit address constants from devicetree without a
UINT64_C wrapping macro results in the following warning and the
cut-off of the address value:

"warning: integer constant is so large that it is unsigned"

This change extends devicetree API adding few wrappers over the
address constant getters which add ULL size suffix to an
address integer literal when the appearance of 64-bit address
values is possible

Signed-off-by: Alexander Razinkov <alexander.razinkov@syntacore.com>