Teensy 3.5 does not have 32ch llwu (#204)

teensy3/kinetis.h

@@ -545,7 +545,7 @@ enum IRQ_NUMBER_t {
 #define HAS_KINETIS_I2C1_STOPF
 #define HAS_KINETIS_I2C2
 #define HAS_KINETIS_I2C2_STOPF
-#define HAS_KINETIS_LLWU_32CH
+#define HAS_KINETIS_LLWU_16CH
 #define HAS_KINETIS_MPU
 #define HAS_KINETIS_ADC0
 #define HAS_KINETIS_ADC1