Fixed an unused param warning in logcat

Changed a function to actually use its parameter instead of a global
variable. All callers of the function pass the global variable as an
argument anyway so behaviour is unchanged.

Change-Id: Ib84d45c17d2213c4d441bf2f423feca14e7aa2f4
Author: Edwin Vane <edwin.vane@intel.com>
Reviewed-by: Ariel J Bernal <ariel.j.bernal@intel.com>