move irqhandler to application

tud_isr() must be called by application to forward the irqhandle to the
stack

hw/bsp/feather_m4_express/feather_m4_express.c

@@ -32,6 +32,29 @@
 #include "hpl/gclk/hpl_gclk_base.h"
 #include "hpl_mclk_config.h"
 
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USB_0_Handler (void)
+{
+  tud_isr(0);
+}
+
+void USB_1_Handler (void)
+{
+  tud_isr(0);
+}
+
+void USB_2_Handler (void)
+{
+  tud_isr(0);
+}
+
+void USB_3_Handler (void)
+{
+  tud_isr(0);
+}
+
 //--------------------------------------------------------------------+
 // MACRO TYPEDEF CONSTANT ENUM DECLARATION
 //--------------------------------------------------------------------+