sensors: sensors_ssc: Add necessary NULL terminator to match

table

The following change mistakenly removed a NULL terminator from
the of_match_id table.

  commit 2dbb824a
  Author: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
  Date: Wed Jan 29 17:51:14 2014 -0800

  ARM: msm: Clean up sensor ADSP driver; OCMEM is no longer used

Doing so allows for memory corruption when walking the table.

Change-Id: I8ecc29da9c70298b410d21da89fe6d5c8a0322e9
Signed-off-by: Michael Bohan <mbohan@codeaurora.org>