clear mmio in some cases

Signed-off-by: Slice <sergey.slice@gmail.com>

rEFIt_UEFI/Platform/Settings.cpp

@@ -691,6 +691,7 @@ SetDevices (LOADER_ENTRY *Entry)
               if (gSettings.Graphics.RadeonDeInit) {
                 for (j = 0; j < gConf.GfxPropertiesArrayNonConst.size(); j++) {
                   if (gConf.GfxPropertiesArrayNonConst[j].Handle == PCIdevice.DeviceHandle) {
+                    SetMem((void*)(gConf.GfxPropertiesArrayNonConst[j].Mmio + 0x6800), 0x800, 0);
                     *(UINT32*)(gConf.GfxPropertiesArrayNonConst[j].Mmio + 0x6848) = 0; //EVERGREEN_GRPH_FLIP_CONTROL, 1<<0 SURFACE_UPDATE_H_RETRACE_EN
                     *(UINT32*)(gConf.GfxPropertiesArrayNonConst[j].Mmio + 0x681C) = 0; //EVERGREEN_GRPH_PRIMARY_SURFACE_ADDRESS_HIGH
                     *(UINT32*)(gConf.GfxPropertiesArrayNonConst[j].Mmio + 0x6820) = 0; //EVERGREEN_GRPH_SECONDARY_SURFACE_ADDRESS_HIGH

rEFIt_UEFI/refit/main.cpp

@@ -1446,7 +1446,7 @@ void LOADER_ENTRY::StartLoader()
         DBG("Error when loading '%ls' : Status %s.\n", OpenRuntimeEfiName.wc_str(), efiStrError(Status));
       }
     }else{
-      DBG("No OpenRuntime driver. This is ok, OpenRuntime is not mandatory.\n");
+      DBG("No OpenRuntime driver. This is wrong, OpenRuntime is mandatory.\n");
     }
 
     OcMain(&mOpenCoreStorage, NULL);