ACPICA: exsystem.c: Use ACPI_FORMAT_UINT64 for 64-bit output

ACPICA commit 82a46ba57fe03ae99342740b92a04d8a8184860d

%llu fails on 32-bit compilers.

Link: https://github.com/acpica/acpica/commit/82a46ba5


Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>