Revert "ACPI/IORT: Fix 'Number of IDs' handling in iort_id_map()"

This reverts commit 3c23b83a.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20200501161014.5935-2-ardb@kernel.org


Signed-off-by: Will Deacon <will@kernel.org>