sdm: Enable only required events in poll.

Initialize poll fd to zero before enabling required
events POLLIN and POLLPRI. This will avoid SDM_EventThread
to wake up continuously for POLLOUT events.

Change-Id: I7f8ce2c0e6e6882e0c7fe1f6a39dc46dbf742ebc
CRs-Fixed: 1033431
1 file changed