fix: serdes: a39x: Add suppport to SGMII(v3)

	-SGMII(v3)wasn't supported in bin header,
	 since it wasn't in the serdes type list,
	-SGMII(3) is added to the serdes list and
	 is handled in all relevant functions and tables

Change-Id: Ie34a02ff19ae4055398d7331ca14d77ba33a2b0f
Signed-off-by: Margarita Granov <margra@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/17841
Reviewed-by: Omri Itach <omrii@marvell.com>
Tested-by: Omri Itach <omrii@marvell.com>
6 files changed