build script: fix v2 bl32 encrypt flow [1/1]

PD#NONE

Problem:
update txl/txlx/txhd/axg v2 bl32 encrypt flow

Solution:
fix tool cmd

Verify:
test pass on txl p321 platform

Change-Id: I1e1fd538db330234cf81c7a091ae700415255e9b
Signed-off-by: xiaobo gu <xiaobo.gu@amlogic.com>
4 files changed