Fix unused param warning

libsuspend had only a single warning in the clang build. Fixing it to
make the build clean.

Change-Id: Iaac5f9144b6e6cb122141c6416056c1b2c9aa98e
Author: Edwin Vane <edwin.vane@intel.com>
Reviewed-by: Kevin P Schoedel <kevin.p.schoedel@intel.com>