AP_IOMCU: break logging out as a method

libraries/AP_IOMCU/AP_IOMCU.cpp

@@ -351,6 +351,11 @@ void AP_IOMCU::read_status()
         }
     }
 
+    write_log();
+}
+
+void AP_IOMCU::write_log()
+{
     uint32_t now = AP_HAL::millis();
     if (now - last_log_ms >= 1000U) {
         last_log_ms = now;

libraries/AP_IOMCU/AP_IOMCU.h

@@ -269,6 +269,8 @@ private:
     void handle_repeated_failures();
     void check_iomcu_reset();
 
+    void write_log();  // handle onboard logging
+
     static AP_IOMCU *singleton;
 
     enum {