To fetch the Oem information from the ConfigurationManagerProtocol and the AcpiTableInfo, and populate the SSDT ACPI header when creating a RootNode via the AmlLib, create AddSsdtAcpiHeader(). Reviewed-by: Sami Mujawar <sami.mujawar@arm.com> Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>