SystemInformation: Fix -Wswitch-enum warnings

Change-Id: Iaa8fda477e06f32f8a1fd7305374d9c6d192a521

SystemInformation.cxx

@@ -1824,6 +1824,7 @@ const char * SystemInformationImplementation::GetVendorID()
       return "Motorola";
     case HP:
       return "Hewlett-Packard";
+    case UnknownManufacturer:
     default:
       return "Unknown Manufacturer";
     }
@@ -3065,6 +3066,12 @@ bool SystemInformationImplementation::RetrieveClassicalCPUIdentity()
     case NSC:
       this->ChipID.ProcessorName = "Cx486SLC \\ DLC \\ Cx486S A-Step";
       break;
+
+    case Sun:
+    case IBM:
+    case Motorola:
+    case HP:
+    case UnknownManufacturer:
     default:
       this->ChipID.ProcessorName = "Unknown family"; // We cannot identify the processor.
       return false;