ACPICA: iASL/NHLT table: "Specific Data" field support

ACPICA commit 26f8c721fb01e4a26eec8c85dffcbe950d5e61a9

Add support for optional "Specific Data" field for the optional
Linux-specific structure that appears at the end of an Endpoint
Descriptor.

Link: https://github.com/acpica/acpica/commit/26f8c721
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

include/acpi/actbl2.h

@@ -1683,7 +1683,10 @@ struct acpi_nhlt_linux_specific_data {
 	u8 device_id[16];
 	u8 device_instance_id;
 	u8 device_port_id;
-	u8 filler[18];
+};
+
+struct acpi_nhlt_linux_specific_data_b {
+	u8 specific_data[18];
 };
 
 struct acpi_nhlt_table_terminator {