fix: msys_ac3: removed ECC update for non DB boards.

	the SatR field that controls the ECC update 'ddreccenable'
	is not supported on AC3 non-DB boards, and the Twsi device
	(on 0x4D) that the field is  saved on does not exist.
	- Before, 'mvSysEnvGetTopologyUpdateInfo' was trying to
	  read the field from non-existing Twsi device (address 0x4D).
	- disabled the Twsi read for AC3 non-DB boards.
	- Fixed JIRA:SYSTEMSW-1687

Change-Id: I7e93637d87c73cad37b585f08005b682934268ef
Signed-off-by: Bassel Saba <basselsa@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/18049
Tested-by: Star_Automation <star@marvell.com>
Reviewed-by: Omri Itach <omrii@marvell.com>
1 file changed