implement most of sleep handling for the new radio stack

src/rf95/SX1262Interface.cpp

@@ -107,4 +107,15 @@ bool SX1262Interface::canSendImmediately()
         DEBUG_MSG("Can not set now, busyTx=%d, busyRx=%d\n", busyTx, busyRx);
 
     return !busyTx && !busyRx;
+}
+
+
+
+bool SX1262Interface::sleep()
+{
+    // we no longer care about interrupts from this device
+    // prepareDeepSleep();
+
+    // FIXME - put chipset into sleep mode
+    return false;
 }