[U-Boot] [U-Boot, 2/3] dtoc: Add a 64-bit type and a way to convert cells into 64 bits

[Philipp Tomsich]

On Mon, 19 Jun 2017, Simon Glass wrote:

> When dealing with multi-cell values we need a type that can hold this
> value. Add this and a function to process it from a list of cell values.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
Tested-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>