[Matrix]: remove one mem copy in csr2fg.
[Matrix]: remove one mem copy in csr2fg.

icoming/FlashX,flashxio/FlashX,icoming/FlashX,icoming/FlashX,icoming/FlashGraph,flashxio/FlashX,icoming/FlashGraph,icoming/FlashGraph,icoming/FlashGraph,flashxio/FlashX,icoming/FlashGraph,flashxio/FlashX,icoming/FlashX,flashxio/FlashX,icoming/FlashX,flashxio/FlashX