MdeModulePkg/SdMmcPciHcDxe: Read response on command completion

SdMmcPciHcDxe driver used to read response only after
command and data transfer completed. According to SDHCI
specification response data is ready after the command
complete status is set by the host controller. Getting
the response data early will help debugging the cases
when command completed but data transfer timed out.

Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Marcin Wojtas <mw@semihalf.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Cc: Liming Gao <liming.gao@intel.com>

Signed-off-by: Mateusz Albecki <mateusz.albecki@intel.com>
Tested-by: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>

MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h

@@ -154,6 +154,7 @@ typedef struct {
 
   EFI_EVENT                           Event;
   BOOLEAN                             Started;
+  BOOLEAN                             CommandComplete;
   UINT64                              Timeout;
   UINT32                              Retries;