relax digitalWrite parameter check

calling digitalWrite with any value different from 0 will end
in performing digitalWrite(HIGH)

cores/arduino/wiring_digital.c

@@ -86,11 +86,8 @@ void digitalWrite( uint32_t ulPin, uint32_t ulVal )
       PORT->Group[g_APinDescription[ulPin].ulPort].OUTCLR.reg = (1ul << g_APinDescription[ulPin].ulPin) ;
     break ;
 
-    case HIGH:
-      PORT->Group[g_APinDescription[ulPin].ulPort].OUTSET.reg = (1ul << g_APinDescription[ulPin].ulPin) ;
-    break ;
-
     default:
+      PORT->Group[g_APinDescription[ulPin].ulPort].OUTSET.reg = (1ul << g_APinDescription[ulPin].ulPin) ;
     break ;
   }