x86/iommu/dmar: Remove warning for HPET scope type

ACPI_DMAR_SCOPE_TYPE_HPET is parsed by
ir_parse_ioapic_hpet_scope() and should not be flagged as an
unsupported type.

Signed-off-by: Linn Crosetto <linn@hp.com>
Cc: joro@8bytes.org
Cc: ddutile@redhat.com
Cc: suresh.b.siddha@intel.com
Link: http://lkml.kernel.org/r/1366741605-71293-1-git-send-email-linn@hp.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>