In order to ensure bigger flexibility in the NotifyPhase routine of the SdMmcOverride protocol, enable using an optional phase-specific data. This will allow to exchange more information between the protocol producer driver and SdMmcPciHcDxe in the newly added callbacks. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Marcin Wojtas <mw@semihalf.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Hao Wu <hao.a.wu@intel.com>