chore(docs): update march utility details

commit@7794d6c8f8c44acc14fbdc5ada5965310056be1e added a march utility
but the details were not updated in docs.

Update docs to provide a glimpse of march utility added.

Change-Id: I696cb9a701a30d7bf36a1ecd38a80d07df1fd551
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
2 files changed