msys: add switch address completion via switchRegRead/Write commands

	add new commands for MSYS for reading/writing to switch
	registers via address completion:
	switchRegRead & switchRegWrite

Change-Id: I155a5507244f64b79939feeb148823cc48c34a1c
Signed-off-by: Bassel Saba <basselsa@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/19366
Tested-by: Star_Automation <star@marvell.com>
Reviewed-by: Omri Itach <omrii@marvell.com>
3 files changed