diag: Initialize spinlock before use

DIAG uses spinlock to implement mutual exclusion among competing
threads for a shared resource. Adding initialization for this
spinlock.

Change-Id: Id2a647d48c94a6656421f72a92b9115f19a1da4b
Signed-off-by: Shalabh Jain <shalabhj@codeaurora.org>
1 file changed