net: sxgbe: add basic framework for Samsung 10Gb ethernet driver

This patch adds support for Samsung 10Gb ethernet driver(sxgbe).

- sxgbe core initialization
- Tx and Rx support
- MDIO support
- ISRs for Tx and Rx
- ifconfig support to driver

Signed-off-by: Siva Reddy Kallam <[email protected]>
Signed-off-by: Vipul Pandya <[email protected]>
Signed-off-by: Girish K S <[email protected]>
Neatening-by: Joe Perches <[email protected]>
Signed-off-by: Byungho An <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
22 files changed