update limit each transfer not less than 64

src/portable/raspberrypi/rp2040/hcd_rp2040.c

@@ -452,6 +452,7 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *
     if (ep_addr != ep->ep_addr)
     {
         // Direction has flipped so re init it but with same properties
+        // TODO treat IN and OUT as invidual endpoints
         _hw_endpoint_init(ep, dev_addr, ep_addr, ep->wMaxPacketSize, ep->transfer_type, 0);
     }
 
@@ -531,6 +532,7 @@ bool hcd_edpt_busy(uint8_t dev_addr, uint8_t ep_addr)
 bool hcd_edpt_stalled(uint8_t dev_addr, uint8_t ep_addr)
 {
     panic("hcd_pipe_stalled");
+    return false;
 }
 
 bool hcd_edpt_clear_stall(uint8_t dev_addr, uint8_t ep_addr)