Deprecate previous Ticker::attach() API

* Restore previous implementation as deprecated
* Ensure method call is unambiguous

drivers/Ticker.h

@@ -83,6 +83,12 @@ public:
         attach_us(func, SECONDS_TO_MICROSECONDS(t));
     }
 
+    MBED_DEPRECATED("This function has been deprecated, use attach(Callback<void()> func, const s_timestamp_t t)")
+    void attach(Callback<void()> func, float t)
+    {
+        attach_us(func, t * 1000000.0f);
+    }
+
     /** Attach a member function to be called by the Ticker, specifying the interval in seconds
      *
      *  @param obj pointer to the object to call the member function on

features/nfc/source/nfc/NFCController.cpp

@@ -183,7 +183,7 @@ void NFCController::scheduler_process(bool hw_interrupt)
     // Process stack events
     uint32_t timeout = nfc_scheduler_iteration(_scheduler, hw_interrupt ? EVENT_HW_INTERRUPT : EVENT_NONE);
 
-    _timeout.attach(callback(this, &NFCController::on_timeout), timeout);
+    _timeout.attach(callback(this, &NFCController::on_timeout), (s_timestamp_t)timeout);
 }
 
 void NFCController::on_hw_interrupt()