qseecom: Add flag to support key wrap in KS

Allow to use KS key instead of user key to wrap
ICE master key. This is required for devices
which don't have provision to modify user key.

Change-Id: I2a7f6cd10a9c69b5d5d8a39e31a3d1630136eaa6
Signed-off-by: Jiten Patel <jitepate@codeaurora.org>