net: Reorder the contents of skb_frag_t

Match the layout of bio_vec.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/skbuff.h

@@ -314,8 +314,8 @@ struct skb_frag_struct {
 	struct {
 		struct page *p;
 	} page;
-	__u32 page_offset;
 	__u32 size;
+	__u32 page_offset;
 };
 
 /**