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

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index c2cf62b..e2cec44 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -622,7 +622,7 @@ static ssize_t usb_device_read(struct file *file, char __user *buf,
 }
 
 /* Kernel lock for "lastev" protection */
-static unsigned int usb_device_poll(struct file *file,
+static __poll_t usb_device_poll(struct file *file,
 				    struct poll_table_struct *wait)
 {
 	unsigned int event_count;