Fix errors

Author: usbalbin

src/rcc/backup.rs

@@ -110,6 +110,15 @@ mod rtc {
             });
             self
         }
+
+        /// # Safety
+        /// Caller has to ensure there are no other instances of this type
+        #[inline(always)]
+        unsafe fn new() -> Self {
+            Rtc {
+                _marker: PhantomData,
+            }
+        }
     }
 
     /// RTC kernel clock source selection

src/usb_hs.rs

@@ -308,7 +308,7 @@ unsafe impl UsbPeripheral for USB1_ULPI {
             rcc.ahb1enr().modify(|_, w| w.usb1otgen().enabled());
 
             // Enable ULPI Clock
-            rcc.ahb1enr().modify(|_, w| w.usb1ulpien().enabled());
+            rcc.ahb1enr().modify(|_, w| w.usb1otgulpien().enabled());
 
             // Reset USB peripheral
             rcc.ahb1rstr().modify(|_, w| w.usb1otgrst().set_bit());