MdeModulePkg/SdMmcPciHcDxe: Add UhsSignaling to SdMmcOverride protocol

Some SD Host Controllers use different values in Host Control 2 Register
to select UHS Mode. This patch adds a new UhsSignaling type routine to
the NotifyPhase of the SdMmcOverride protocol.

UHS signaling configuration is moved to a common, default routine
(SdMmcHcUhsSignaling). After it is executed, the protocol producer
can override the values if needed.

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>

MdeModulePkg/Include/Protocol/SdMmcOverride.h

@@ -26,11 +26,28 @@
 
 typedef struct _EDKII_SD_MMC_OVERRIDE EDKII_SD_MMC_OVERRIDE;
 
+//
+// Bus timing modes
+//
+typedef enum {
+  SdMmcUhsSdr12,
+  SdMmcUhsSdr25,
+  SdMmcUhsSdr50,
+  SdMmcUhsSdr104,
+  SdMmcUhsDdr50,
+  SdMmcMmcLegacy,
+  SdMmcMmcHsSdr,
+  SdMmcMmcHsDdr,
+  SdMmcMmcHs200,
+  SdMmcMmcHs400,
+} SD_MMC_BUS_MODE;
+
 typedef enum {
   EdkiiSdMmcResetPre,
   EdkiiSdMmcResetPost,
   EdkiiSdMmcInitHostPre,
   EdkiiSdMmcInitHostPost,
+  EdkiiSdMmcUhsSignaling,
 } EDKII_SD_MMC_PHASE_TYPE;
 
 /**