gflt400: Configure both Ethernet MACs

Configures both Ethernet MACs (SGMII and PHY) on the 88F6601:

 - ethSataComplexOpt: as requested by Marvell in go/fibercl/82370
 - setting additional bit for SGMII_1G (Marvell's patch only set
   it for 2.5G)
 - adds some SGMII print statements during boot

Change-Id: Ie2c7ab8782d6b9509b22e191bf5d2edc49989ee9
3 files changed