Add break for default cases

Visual Studio has an option to search all files in a solution, so I
did a search in there for "default:" looking for any missing break
statements.

I've left out default statements that return something, and that throw
something, even if via ThrowInvalidType. UNREACHABLE leads towards throw

R_THROW macro leads towards a return

src/yuzu/compatdb.cpp

@@ -63,6 +63,7 @@ void CompatDB::Submit() {
         break;
     default:
         LOG_ERROR(Frontend, "Unexpected page: {}", currentId());
+        break;
     }
 }