qseecom: Fix ICE create and wipe key issues

While create/wipe the encryption key ICE hw setup is triggered
to make sure that HW is ready. During that return value is not
properly checked which results in key create/wipe success even
if its not set on the hardware.

Change-Id: I96ad90c760d93fbcdf6ae13e2e497b147fe00b7c
Signed-off-by: AnilKumar Chimata <anilc@codeaurora.org>