Re: Marvell Phy (1510) issue since v4.7 kernel

From Marvell's brief description http://www.marvell.com/transceivers/alaska-gbe/,
it seems that 88E1510/1518 don't support fiber. Only 88E1512 does. In
that case, the fiber support patch is not applicable to 88E1510/1518.

O.K. That makes it easier.

Please add the relevant IDs to include/linux/marvell.h, and add
entries to driver/net/phy/marvell.c for 1512 with SUPPORTED_FIBRE and
1510 and 1518 without.

     Andrew