mlxbf-bootctl: Support the large icmc write/read

mlxbf-bootctl: Support the large icmc write/read

Enable reading and writing the size of the memory region associated
with the large ICM carveout.
The max size of the large ICM carveout is 1TB, has a granularity
of 128MB and will be passed and printed in hex. The size unit is MB.

Signed-off-by: Asmaa Mnebhi <asmaa@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/20230809162857.21243-2-asmaa@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>