fix gcc warning and logging

epicardium/usb/epc_usb.c

@@ -366,11 +366,11 @@ static void cb_timerReset(TimerHandle_t t)
 {
 	(void)t;
 	int s = usb_get_status();
-	LOG_INFO("usb", "cb_timerReset %08x", s);
+	LOG_DEBUG("usb", "cb_timerReset %08x", s);
 
-	LOG_INFO("usb", "SYS_USBHS_Shutdown");
+	LOG_DEBUG("usb", "SYS_USBHS_Shutdown");
 	SYS_USBHS_Shutdown();
-	LOG_INFO("usb", "SYS_Reset_Periph");
+	LOG_DEBUG("usb", "SYS_Reset_Periph");
 	SYS_Reset_Periph(SYS_RESET_USB);
 
 	//copy-paste from esb_init(), need to refactor
@@ -383,7 +383,7 @@ static void cb_timerReset(TimerHandle_t t)
 	/* Initialize the usb module */
 	if (usb_init(&usb_opts) != 0) {
 		LOG_ERR("usb", "usb_init() failed");
-		return -EIO;
+		return;
 	}
 	usb_event_enable(MAXUSB_EVENT_NOVBUS, cb_usb_event, NULL);
 	usb_event_enable(MAXUSB_EVENT_VBUS, cb_usb_event, NULL);
@@ -391,7 +391,7 @@ static void cb_timerReset(TimerHandle_t t)
 
 static void scheduleReset()
 {
-	LOG_INFO("usb", "scheduleReset");
+	LOG_DEBUG("usb", "scheduleReset");
 	xTimerChangePeriodFromISR(timerWakeup, pdMS_TO_TICKS(500), NULL);
 }