net: ethernet: aquantia: Low-level hardware interfaces

Add definitions of functions that interface directly with the hardware.

Signed-off-by: Alexander Loktionov <[email protected]>
Signed-off-by: Dmitrii Tarakanov <[email protected]>
Signed-off-by: Pavel.Belous <[email protected]>
Signed-off-by: Dmitry Bezrukov <[email protected]>
Signed-off-by: David M. VomLehn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: David VomLehn