[PATCH -next] xen: Fix one kernel-doc comment

[Yang Li <yang.lee@xxxxxxxxxxxxxxxxx>]

Use colon to separate parameter name from their specific meaning.
silence the warning:

drivers/xen/grant-table.c:1051: warning: Function parameter or member 
'nr_pages' not described in 'gnttab_free_pages'

Reported-by: Abaci Robot <abaci@xxxxxxxxxxxxxxxxx>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=6030
Signed-off-by: Yang Li <yang.lee@xxxxxxxxxxxxxxxxx>
---
 drivers/xen/grant-table.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index f13c3b76ad1e..35659bf70746 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -1044,7 +1044,7 @@ EXPORT_SYMBOL_GPL(gnttab_pages_clear_private);
 
 /**
  * gnttab_free_pages - free pages allocated by gnttab_alloc_pages()
- * @nr_pages; number of pages to free
+ * @nr_pages: number of pages to free
  * @pages: the pages
  */
 void gnttab_free_pages(int nr_pages, struct page **pages)
-- 
2.20.1.7.g153144c