board/t1040qds: Add sgmii ports support in 0xA7 protocol

T1042QDS (T1042 is T1040 Personality without L2 switch) supports following
sgmii interfaces with serdes protocol 0xA7
-SGMII-MAC3 on Lane B - slot 7
-SGMII-MAC5 on Lane H - slot 7
-SGMII2.5G-MAC1 on Lane C - slot 6
-SGMII2.5G-MAC2 on Lane D - slot 5

Add support of above sgmii interfaces

Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com>