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

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index 215eac6..5a7b30d 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -194,7 +194,7 @@
 	return ret;
 }
 
-static unsigned int rtc_dev_poll(struct file *file, poll_table *wait)
+static __poll_t rtc_dev_poll(struct file *file, poll_table *wait)
 {
 	struct rtc_device *rtc = file->private_data;
 	unsigned long data;