Send SMS RP ERROR with a failure cause that relates to
the status returned by the ESME in the deliver_sm_resp.
Actual mapping array is limited as most phones I tested
don't seem to care about the failure cause anyway,
although some will display a different notification for
GSM411_RP_CAUSE_MO_NUM_UNASSIGNED
Change-Id: I61fb2d9ef4f2d2eabdc49b53d9966ad328d15e51