qseecom: fix secure app loading failure by kernel mode qseecom client

Make a change to fix secure app loading failure due to premature
kzfree() from __qseecom_load_fw(), when kernel mode qseecom client
tries to load app.

CRs-fixed: 694541
Signed-off-by: William Clark <wclark@codeaurora.org>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>