pl011: fix incorrect byte written in write()

kernel/driver/bsp/arm/src/pl011.rs

@@ -98,7 +98,7 @@ impl TerminalOutput for Pl011Inner {
         if byte == b'\n' && options.contains(TerminalOutputOptions::NL_TO_CRNL) {
             lock.send(b'\r');
         }
-        lock.send(b'\n');
+        lock.send(byte);
         Ok(())
     }