qcacld-3.0: Use updated serialization api to purge the commands

Few enhancements are made in serialization module to flush the commands
per vdev. Use updated serialization API to accommodate new changes.

Change-Id: I8df9900d83bea758ca5c50cbe0edf31e06f83a4c
CRs-Fixed: 2099063
diff --git a/core/sme/src/common/sme_api.c b/core/sme/src/common/sme_api.c
index 703e39c..76e46fa 100644
--- a/core/sme/src/common/sme_api.c
+++ b/core/sme/src/common/sme_api.c
@@ -840,6 +840,8 @@
 	sme_p2p_open(pMac);
 	sme_trace_init(pMac);
 	sme_register_debug_callback();
+	wlan_serialization_legacy_init_callback();
+
 	return status;
 }