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

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index eb85b54..e4be89d 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -1630,10 +1630,10 @@ static ssize_t ucma_write(struct file *filp, const char __user *buf,
 	return ret;
 }
 
-static unsigned int ucma_poll(struct file *filp, struct poll_table_struct *wait)
+static __poll_t ucma_poll(struct file *filp, struct poll_table_struct *wait)
 {
 	struct ucma_file *file = filp->private_data;
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 
 	poll_wait(filp, &file->poll_wait, wait);