arm: imx: hab: Print HAB event log only after calling ROM

arm: imx: hab: Print HAB event log only after calling ROM

The current flow of authenticate_image() will print the HAB event log even
if we reject an element of the IVT header before ever calling into the ROM.
This can be confusing.

This patch changes the flow of the code so that the HAB event log is only
printed out if we have called into the ROM and received some sort of status
code.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Suggested-by: Cc: Breno Matheus Lima <[email protected]>
Cc: Stefano Babic <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: Peng Fan <[email protected]>
Cc: Albert Aribaud <[email protected]>
Cc: Sven Ebenfeld <[email protected]>
Cc: George McCollister <[email protected]>
Tested-by: Breno Lima <[email protected]>
Reviewed-by: Fabio Estevam <[email protected]>