tfm_ci_pylib/utils: export_config_map: fix indentation to save all configs

export_config_map() is supposed to save the configurations dictionary to
JSON files. Only one configuration is currently saved due to a wrong
indentation of save_json() call.

Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
Change-Id: Id034014abe97c207afb241277d74c8872ec9f80f
1 file changed