ACPICA: Allow for supressing leading zeros when using acpi_ex_convert_to_ascii()

ACPICA commit 792a337104ce2c1729d33d76241b42b3214aa60f

Allow to specifiy wether leading zeros should be supressed
ot not when using acpi_ex_convert_to_ascii().

Link: https://github.com/acpica/acpica/commit/792a3371


Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>