xfs: move inode generation count to VFS inode

Pull another 4 bytes out of the xfs_icdinode.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 4c184f7..6401e3c 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -149,10 +149,12 @@
 {
 	int		error;
 	uint32_t	nlink = inode->i_nlink;
+	uint32_t	generation = inode->i_generation;
 
 	error = inode_init_always(mp->m_super, inode);
 
 	set_nlink(inode, nlink);
+	inode->i_generation = generation;
 	return error;
 }