ACPICA: ACPI 6.3: add GTDT Revision 3 support

ACPICA commit 2cd926fdf360062adcaac1349cb94136590c1c74

Link: https://github.com/acpica/acpica/commit/2cd926fd
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

include/acpi/actbl1.h

@@ -1001,6 +1001,11 @@ struct acpi_table_gtdt {
 #define ACPI_GTDT_INTERRUPT_POLARITY    (1<<1)
 #define ACPI_GTDT_ALWAYS_ON             (1<<2)
 
+struct acpi_gtdt_el2 {
+	u32 virtual_el2_timer_gsiv;
+	u32 virtual_el2_timer_flags;
+};
+
 /* Common GTDT subtable header */
 
 struct acpi_gtdt_header {