diag: Fix for possible dci stale entries

This patch provides the protection to dci client
entries from corruption.

CRs-Fixed: 984942 992683
Bug: 62378232
Change-Id: Ifcd9f14dc03d9e42a31b3e126839489881e98303
Signed-off-by: Manoj Prabhu B <bmanoj@codeaurora.org>
Signed-off-by: Mohit Aggarwal <maggarwa@codeaurora.org>