lx2160a: change some repos on the manifest

Created by: apalos

Work on lx2160 EDK2 side is currently on upstream review. Switch branches to the ones we use for upstreaming.

The OP-TEE patches have already been upstream, so switch to upstream OP-TEE as well

Signed-off-by: Ilias Apalodimas ilias.apalodimas@linaro.org