[PATCH] ixgb: Redefined buffer_info-dma to be dma_addr_t instead of uint64

Redefined buffer_info-dma to be dma_addr_t instead of uint64

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>