Fix USTICKER build error for LPC11U35_401

targets/TARGET_NXP/TARGET_LPC11UXX/us_ticker.c

@@ -17,6 +17,8 @@
 #include "us_ticker_api.h"
 #include "PeripheralNames.h"
 
+#if DEVICE_USTICKER
+
 #define US_TICKER_TIMER          ((LPC_CTxxBx_Type *)LPC_CT32B1_BASE)
 #define US_TICKER_TIMER_IRQn     TIMER_32_1_IRQn
 
@@ -70,3 +72,5 @@ void us_ticker_free(void)
 {
 
 }
+
+#endif // DEVICE_USTICKER

targets/targets.json

@@ -374,8 +374,13 @@
             "SERIAL",
             "SLEEP",
             "SPI",
-            "SPISLAVE"
+            "SPISLAVE",
+            "USTICKER"
         ],
+        "overrides": {
+            "tickless-from-us-ticker"   : true,
+            "boot-stack-size"           : "0x400"
+        },
         "default_lib": "small",
         "release_versions": ["2"],
         "device_name": "LPC11U35FBD48/401"