fs: crypto: fix issue introduced with lts-integration

Fix the perf issue introduced with wrong conflict resolution of
'commit 81b89766408b ("Merge android-4.9.175 (e2171b62) into msm-4.9")'.

Change-Id: I3b368c5efd8e297bbe6b5c6e3ad12389a0edde7e
Signed-off-by: Neeraj Soni <neersoni@codeaurora.org>