wlan: Clear any key values in the memory.

Clear the key values from the memory when session is
being removed and/or when no need of the key values.

Change-Id: I5914d6521855c021d1d9e2f268771a4113e5f6ef
CRs-Fixed: 737934
diff --git a/CORE/SME/src/sme_common/sme_Api.c b/CORE/SME/src/sme_common/sme_Api.c
index e0d5110..9e367e1 100644
--- a/CORE/SME/src/sme_common/sme_Api.c
+++ b/CORE/SME/src/sme_common/sme_Api.c
@@ -2285,6 +2285,8 @@
                 if (pMsg->bodyptr)
                 {
                     sme_ProcessGetGtkInfoRsp(pMac, pMsg->bodyptr);
+                    vos_mem_zero(pMsg->bodyptr,
+                                  sizeof(tSirGtkOffloadGetInfoRspParams));
                     vos_mem_free(pMsg->bodyptr);
                 }
                 else