fix build with mbed rp2040

Author: hathach

src/arduino/ports/rp2040/Adafruit_TinyUSB_rp2040.cpp

@@ -88,6 +88,10 @@ static void usb_task_irq(void) {
   }
 }
 
+#ifndef PICO_SHARED_IRQ_HANDLER_LOWEST_ORDER_PRIORITY
+#define PICO_SHARED_IRQ_HANDLER_LOWEST_ORDER_PRIORITY 0x00
+#endif
+
 // invoked when there is hardware usb irq, trigger task runner later
 static void usb_task_trigger_irq(void) { irq_set_pending(USB_TASK_IRQ); }
 

src/portable/raspberrypi/rp2040/dcd_rp2040.c

@@ -384,6 +384,11 @@ static void __tusb_irq_path_func(dcd_rp2040_irq)(void)
 /* Controller API
  *------------------------------------------------------------------*/
 
+// older SDK
+#ifndef PICO_SHARED_IRQ_HANDLER_HIGHEST_ORDER_PRIORITY
+#define PICO_SHARED_IRQ_HANDLER_HIGHEST_ORDER_PRIORITY 0xff
+#endif
+
 void dcd_init (uint8_t rhport)
 {
   assert(rhport == 0);