Fix issues in ofono_sim_get_phase and its usage

Hi, Following patch adds the missing OFONO_SIM_PHASE_UNKNOWN check in some of the functions which uses ofono_sim_get_phase. Also fixed the issue in ofono_get_sim_phase when the passed sim paramter is NULL. Jeevaka Badrappan (2): sim: fix minor issue in ofono_sim_get_phase simfs: Add unknown sim phase check src/sim.c | 2 +- src/simfs.c | 9 ++++++++- 2 files changed, 9 insertions(+), 2 deletions(-)