msm: sensor: validate the i2c table index before use

Verifying the i2c table index value before accessing
the i2c table to avoid memory corruption issues.
CRs-Fixed: 1065916

Change-Id: I0e31c22f90006f27a77cd420288334b8355cee95
Signed-off-by: Sureshnaidu Laveti <lsuresh@codeaurora.org>
Signed-off-by: Suman Mukherjee <sumam@codeaurora.org>