Revert "remove stray print statement"

This reverts commit 8da1a9c.

Author: jonas-schievink

nrf-hal-common/src/usbd/mod.rs

@@ -567,6 +567,12 @@ impl UsbBus for Usbd<'_> {
     }
 
     fn set_stalled(&self, ep_addr: EndpointAddress, stalled: bool) {
+        semidap::trace!(
+            "Usbd::set_stalled(index={}, stalled={})",
+            ep_addr.index() as u8,
+            stalled as u8
+        );
+
         interrupt::free(|cs| {
             let regs = self.periph.borrow(cs);