Neterion: New driver: Traffic & alarm handler

Neterion: New driver: Traffic & alarm handler

This patch takes care of trafic handling related APIS.
- Interrupt Enable and disable
- Mask / Unmask Interrupt
- Traffic Interrupt handling.
- Alarm Interrupt handling.

- Changes in this submission -
        - General clean up - removed redundant includes, defines and macros.

- Changes in previous submissions -
 - General cleanup - removed unused functions and variables.
 - Use asserts where necessary - Reported by Andi Kleen
 - Fixed sparse warnings - Reported by Andi Kleen
 - Use a prefix, "__vxge" in front of hw functions to make them globally
   unique - Ben Hutchings

Signed-off-by: Sivakumar Subramani <[email protected]>
Signed-off-by: Rastapur Santosh <[email protected]>
Signed-off-by: Ramkrishna Vepa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>