Report the LPA by checking mii_if_info, instead of just saying "no LPA" every
time.

Cc: David S. Miller <davem@davemloft.net>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NNikita Kiryanov <nikita@compulab.co.il>
Signed-off-by: NIgor Grinberg <grinberg@compulab.co.il>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>