soc/nvidia/tegra(124|210): Add distclean targets

Add distclean targets so these can be called by the junit.xml test
target needed for jenkins testing.

Change-Id: I5991b43503da1778a6d74a57fbc0daf862e570d7
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: https://review.coreboot.org/26433
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2 files changed