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

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/char/apm-emulation.c b/drivers/char/apm-emulation.c
index 1dfb9f8..a2a1c14 100644
--- a/drivers/char/apm-emulation.c
+++ b/drivers/char/apm-emulation.c
@@ -236,7 +236,7 @@
 	return ret;
 }
 
-static unsigned int apm_poll(struct file *fp, poll_table * wait)
+static __poll_t apm_poll(struct file *fp, poll_table * wait)
 {
 	struct apm_user *as = fp->private_data;