the rest of drivers/*: annotate ->poll() instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 427e0d5..081bbbb 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2368,10 +2368,10 @@ static ssize_t n_tty_write(struct tty_struct *tty, struct file *file,
  *	Called without the kernel lock held - fine
  */
 
-static unsigned int n_tty_poll(struct tty_struct *tty, struct file *file,
+static __poll_t n_tty_poll(struct tty_struct *tty, struct file *file,
 							poll_table *wait)
 {
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 
 	poll_wait(file, &tty->read_wait, wait);
 	poll_wait(file, &tty->write_wait, wait);