qseecom: Fix issue related to retrieving pipe for PFE

Incorrect  parameter is overwritten when reading information
related to what pipe is used for PFE feature.

Change-Id: I6747fa0b8b99d937475d3d12e2f9ed9a723f91bb
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>