Some platforms such as TI's k3 outputs a TARGET_BOARD directory
in their ATF build output paths after PLATFORM.
$(@D)/build/<PLATFORM>/ does not contain the debug or release
directories for these platforms.
They are under $(@D)/build/<PLATFORM>/<TARGET_BOARD>/
Signed-off-by: Xuanhao Shi <x-shi@ti.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>