fix(versal): fix the incorrect log message

When the atf-handoff-params are updated we are returning
FSBL_HANDOFF_SUCCESS, but the return condition is wrongly
updated and added a error log which is incorrect.
Fixing the incorrect log message.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com>
Change-Id: I44ebbb861831b86afcb87f09ddb2e23614393c28