feat(usb_device): add getters

src/types/usb_device.rs

@@ -93,6 +93,16 @@ impl<const L: usize> UsbDevice<L> {
         })
     }
 
+    #[inline(always)]
+    pub fn get_usb_device<'u>(&'u self, cs: CriticalSection<'u>) -> &'u USB_DEVICE {
+        self.usb.borrow(cs)
+    }
+
+    #[inline(always)]
+    pub fn get_pll<'u>(&'u self, cs: CriticalSection<'u>) -> &'u PLL {
+        self.pll.borrow(cs)
+    }
+
     #[inline(always)]
     pub(crate) fn allocated_endpoints(&self) -> impl Iterator<Item = (usize, &USBEndpoint)> {
         self.ep_table