acpi: Add define for GTDT

Add the interrupt flag used in ACPI GTDT table as define.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Moritz Fischer <moritzf@google.com>
1 file changed