LAVA: Deprecate redundant codes in LAVA helper

LAVA monitor only relies on bl2, regression tests and psa arch tests.
This patch updates the LAVA helper logics to select LAVA monitor in a
much easier way, instead of looping all build params.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ic00ce2ac308dcf4bd502212bb4e56234576b430f
17 files changed