fix: eth: msys_bc2: disable 2nd ETH port for board RD-DXBC2-48G-12XG2XLG

	the BobCat2 board: RD-DXBC2-48G-12XG2XLG has only a single ETH port
	(MAC0 --> SGMII, via 1512 PHY, with SMI address = 0)

	- Disabled the non-existing 2nd ETH Port, that was configured to MAC1

Change-Id: Ic2d8e60ab145d8f6d342499048dc975eecd886f6
Signed-off-by: Omri Itach <omrii@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/23106
Tested-by: Star_Automation <star@marvell.com>
Reviewed-by: Hanna Hawa <hannah@marvell.com>
1 file changed