acpi: annotate ->poll() instances

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

drivers/acpi/acpi_dbg.c

@@ -718,9 +718,9 @@ static ssize_t acpi_aml_write(struct file *file, const char __user *buf,
 	return size > 0 ? size : ret;
 }
 
-static unsigned int acpi_aml_poll(struct file *file, poll_table *wait)
+static __poll_t acpi_aml_poll(struct file *file, poll_table *wait)
 {
-	int masks = 0;
+	__poll_t masks = 0;
 
 	poll_wait(file, &acpi_aml_io.wait, wait);
 	if (acpi_aml_user_readable())