MLK-20916-2: doc: imx: ahab: Update AHAB document to include ahab_status command

Since commit cf2acc5b7cde ("MLK-18942-2 imx8: ahab: Add ahab_status
 command") the U-Boot is able to display and parse the SECO events.

Update AHAB guides to use U-Boot ahab_status command instead of
SCFW CLI.

Starting in SECO FW v0.2.0 engineering release an invalid image
integrity is logged as an event in open mode. As ahab_status
is able to return this event the note can be removed.

Signed-off-by: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 385ed19051a47f5858e8d326e5ee97f8a08a679d)
2 files changed