msm: fastcvpd: removing spin_lock around hyp_assign

Removing spin_lock around hyp_assign since hyp_assign
will call kmalloc and block spin_lock for longer
duration.

Change-Id: I98a4aecc577102c0e8a422eee1f72cec1f949391
Acked-by: Abhikrant Sharma <abhikran@qti.qualcomm.com>
Signed-off-by: Suman Voora <sssanjee@codeaurora.org>